1	- Civil and Environmental Engineering (MIT department)
10	- Chemical Engineering (MIT department)
11	- Urban Studies and Planning (MIT department)
12	- Earth, Atmospheric, and Planetary Sciences (MIT department)
13	- Ocean Engineering (MIT department)
14	- Economics (MIT department)
15	- Management (MIT department)
16	- Aeronautics and Astronautics (MIT department)
17	- Political Science (MIT department)
18	- Mathematics (MIT department)
2	- Mechanical Engineering (MIT department)
20	- Program in Applied Biological Sciences (MIT department)
21	- Humanities (MIT department)
21A	- Anthropology/Archaeology (MIT department)
21F	- Foreign Languages and Literatures (MIT department)
21H	- History (MIT department)
21L	- Literature (MIT department)
21M	- Music and Theater Arts (MIT department)
21W	- Program in Writing and Humanistic Studies (MIT department)
22	- Nuclear Engineering (MIT department)
24	- Linguistics and Philosophy (MIT department)
2CB	- 4-bromo-2,5-dimethoxyphenethylamine
3	- Materials Science and Engineering (MIT department)
4	- Architecture (MIT department)
5	- Chemistry (MIT department)
6	- Electrical Engineering and Computer Science (MIT department)
7	- Biology (MIT department)
8	- Physics (MIT department)
9	- Brain and Cognitive Sciences (MIT department)
AAC	- Activities for the Athletically Clined
AAC	- Administrative Advisory Council (MIT; as in aac-aoquery)
AARP	- American Association of Retired People
AB	- Alberta (Canadian Province)
ABN	- Angled Bed of Nails [telco buttset lead type]
ABNF	- Augumented Backus-Naur Form
ACH	- Automated Clearing House [transfer] (banking)
ACLS	- Advanced Cardiac Life Support (Medical)
ACMG	- Academic Computing Management Group [MIT I/S]
ADD	- Attention Deficit Disorder
ADHD	- Attention Deficit Hyperactivity Disorder
ADSL	- Assymetric Digital Subscriber Line
ADSM	- Adstar Distributed Storage Manager
AF	- Abstraction Function
AFAICT	- As Far As I Can Tell
AFAIK	- As Far As I Know
AFJ	- April Fools' Joke
AFROTC	- Air Force Reserve Officer Training Corps
AH	- Air Handler (MIT PP)
AH9	- AH that serves SIPB (MIT PP)
AHPF	- All Hail Pass Fail 
AHT	- Aspiring Harvard Technologists (compare THA)
AIM	- AOL Instant Messenger
AIM	- Access Isolation Mechanism (Multics)
AISB	- Ancient Illuminated Seers of Bavaria
AIUI	- As I Understand It (gale)
AL	- Aluminum
ALK	- Automated Lamellar Keratoplasty [vision correction]
ALS	- Advanced Life Support (Medical)
AMD	- automounter daemon
AMP	- Advanced Music Performance [MIT]
AMPR	- AMateur Packet Radio Network
AMSL	- Active Materials and Structures Laboratory [MIT]
ANT	- All Night Tool [MIT]
ANT	- Alphabetic Number Tables [MIT]
AO	- Administrative Officer
APC	- Armored Personel Carrier (Military)
AR	- Argentina
ARIN	- American Registry for Internet Numbers
ASB	- Alternative Spring Break [MIT 1999]
ASB	- alt.sex.bondage (Usenet)
ASL	- American Sign Language
ASNWS	- A Simple No Would Suffice
ASO	- Arab Student Organization
ASO	- Athena Software Operations
ASS	- Athena Software Service team
ATAPI	- AT Attachment Packet Interface
ATDOTOCICOSO	- At The Discretion Of The Office Czar In Charge Of Special Operations [SIPB]
ATE	- Athena/Tether/Eudora (refers to Kerberos passwords)
ATFP	- AppleTalk Filing Protocol
ATM	- At The Moment
AUI	- Athena User Interface
AUP	- Advanced Undergraduate Project (MIT)
AVS	- Address Verification System (Credit Card)
AXCOAPO	- Alpha Chi chapter of Alpha Phi Omega
AYMK	- As You May Know
AYT	- Are You There
B	- Boron
B5	- Babylon 5 (TV series)
BA	- Behavior Aggregate (IETF Differentiated Services)
BA	- Bell Atlantic
BAK	- Back at Keyboard (slang, Usenet, IRC; see also AFK)
BCE	- Bell Canada Enterprises
BCP	- Best Current Practice (IETF)
BCS	- Bardeen, Cooper, and Schreiffer (standard superconductor model)
BDT	- Ballroom Dance Team (MIT)
BE	- Beryllium
BEC	- Bose-Einstein Condensate
BEL	- BELl (ASCII 7)
BEH	- Bioengineering and Environmental Health
BF&I	- Brute Force and Ignorance [ietf-ppp]
BFG	- Big Fucking Gun
BFNN    - Bizarre Format with No Name (document format)
BIAB	- back in a bit 
BIF	- Booth Improvement Fund [Committee] (LSC)
BITD	- Back In The Day
BLB	- Boston Licensing Board
BLS	- Basic Life Support (Medical)
BLS	- Basic Living Stipend (David Weber's Honor Harrington universe)
BNL	- Barenaked Ladies (Musical group)
BOFH	- Bastard Operator From Hell
BOHICA	- Bend Over, Here It Comes Again
BOP	- Broken Orange Pekoe (cf FOP)
BORG	- Backbone Operators' Retreat / Gathering [Internet]
BOS	- Basic Overseer Server (AFS)
BR	- BedRoom (Real-Estate)
BSG	- Brotherhood of Saint Gregory
BSOD	- Blue Screen of Death (Windows NT, et.al.)
BTDT	- Been There, Done That
BTDTGTTS	- Been There, Done That, Got The T-Shirt
BTLS	- Basic Trauma Life Support (Medical)
BW	- Black & White
BYOB	- Bring Your Own Bottle
C	- Carbon
C2	- Command and Control
C4I	- Command, Control, Computers, Communications, and Information
CA	- Canada (ISO country code)
CA	- Central America (MIT SIPB project)
CAC	- Campus Activities Complex (MIT)
CAIDA	- Cooperative Association for Internet Data Analysis
CAN	- Cancel (ASCII 24)
CAP	- Committee on Academic Performance (MIT)
CAP	- Competitive Access Provider (telco)
CBC	- Cambridge Brewing Company
CBQ	- Class-Based Queueing
CCC	- Campus Crusade for Christ
CCC	- Campus Crusade for Cthulhu
CCP	- Communications, Control, & Planning (MIT: John Curry)
CCR	- Center for Cancer Research (MIT)
CCR	- Computer Communications Review (ACM SIGCOMM publication)
CDF	- Channel Definition Format (Microsoft)
CECI	- The Center for Educational Computing Initiatives
CEG	- Course Evaluation Guide (MIT)
CELCO	- Cambridge Electric Light Company (a division of Com Electric)
CESDIS	- Center of Excellence in Space Data and Information Sciences
CF	- "confer", a Latin verb in the imperative, meaning "compare [with]"
CFG	- Context Free Grammar
CFG	- Control Flow Graph
CGI	- Common Gateway Interface
CIDA	- Canadian International Development Agency
CIR	- Commited Information Rate
CJK	- Chinese/Japanese/Korean
CJKV	- Chinese/Japanese/Korean/Vietnamese
CL	- Common Lisp
CLEC	- Competitive Local Exchange Carrier
CMA	- Cover My Ass
CND	- Computer Network Defense
CNID	- Calling Number IDentification (proper name for Caller-ID)
CO	- Clothing Optional
COD	- Committee On Discipline
COPA	- Child Online Protection Act (successor to CDA)
COTS	- Commercial Off The Shelf
COUHES	- Committee On the Use of Humans as Experimental Subjects (MIT)
CP	- Campus Police (MIT)
CPI	- Consumer Price Index (economic metric)
CPK	- California Pizza Kitchen
CPT	- Cisco Protocol Translator ("pasta PAD")
CRC	- Chemical Rubber Company (usu. CRC's guide to chemistry and physics)
CRL	- Computer Resource Lab (MIT, Dept. Urban Studies & Planning)
CSS	- Cascading Style Sheets (XML)
CT	- Carrier Transitions (datacom)
CTCSS	- Continuous Tone-Coded Squelch System (radio)
CTO	- Chief Technical Officer
CTTOI	- Come To Think Of It
CU	- Copper
CUP	- Central Utilities Plant (MIT)
CVS	- Concurrent Versioning System
CW	- ClockWise
CW	- Conventional Wisdom
CYA	- Cover Your Ass
DADN	- Data Access Directory Number
DARYL	- data analysis robotic youth lifeform
DC	- Darn Cat (Disney)
DC	- Direct Control
DC1	- Direct Control 1 (ASCII 17, XON)
DC2	- Direct Control 2 (ASCII 18)
DC3	- Direct Control 3 (ASCII 19, XOFF)
DC4	- Direct Control 4 (ASCII 20)
DCFL	- Direct Coupled FET Logic
DCI	- Defensive CounterInformation Operations
DCIEM	- Defence and Civil Institute of Environmental Medicine (Canada)
DCM	- Data Control Manager [moira]
DCSB	- Dry Cooked Sliced Beef
DEFCON	- DEFense CONdition (5 best, 1 worst)
DEL	- DELete (ASCII 127)
DFA	- Deterministic Finite Automaton
DFSG	- Debian Free Software Guidelines
DH	- Designated Hitter (baseball)
DH	- Diffie-Hellman (cryptography)
DHCP	- Dynamic Host Configuration Protocol
DHTML	- Dynamic HyperText Markup Language
DJIA	- Dow Jones Industrial Average (stock index)
DLC	- Department, Labratory, or Center (MIT)
DLF	- Directed Light Fabrication
DMC	- Distributed Mail Center (MIT)
DMT	- N,N-dimethyltryptamine
DND	- Department of National Defence (Canada)
DNFI	- Daily News From Iceland (http://www.centrum.is/icerev/daily1.html)
DNR	- Do Not Resuscitate
DNRC	- Dogbert's New Ruling Class
DOB	- 2,5-Dimethoxy-4-bromoamphetamine
DOCSIS	- Data Over Cable Service Interface Specification
DOF	- Department of Facilities (MIT. ex-Physical Plant)
DOM	- Document Object Model
DOMA	- Defense of Marriage Act
DOQ	- Digital Orthophoto Quad (USGS Map Type)
DORMCON	- DORMitory COuNcil
DRUMS	- Detailed Revision/Update of Message Standards (IETF)
DS	- Differentiated Services (IETF)
DSLAM	- Digital Subscriber Line Access Multiplexer
DSN	- Defense Switched Network
DTRT	- Do The Right Thing
DTW	- Destroy The World
DTWT	- Do The Wrong Thing (contrast with DTRT)
DTYD	- Drink Till You Drop (party at MIT)
DVI	- DeVice Independent
DWIW	- Do What I Want
DWYW	- Do What You Want
DXM	- dextromethorphan hydrobromide
DXPC	- Differential X Protocol Compressor
DoS	- Denial of Service
EANAB	- Equally Attractive Non-Alcoholic Beverage
EAPS	- Earth, Atmospheric, and Planetary Sciences (Course 12)
EAR	- Export Administration Regulations
ECMA	- ... communication systems (as of 1994)
ECMA	- European association for standardizing information and ...
ECR	- El Camino Real (California Highway 82)
EFL	- Email Forwarding for Life
EGCS	- Experimental GNU compiler suite
EIGRP	- Enhanced Interior Gateway Routing Protocol
EIK	- Eat-In-Kitchen (Real-Estate)
EIRP	- Effective Isotropic Radiated Power
EM	- End of Medium (ASCII 25)
ENQ	- ENQuire (ASCII 5)
EPCOT	- Experimental Prototype Community Of Tomorrow (Disney)
EPR	- Einstein, Podolsky, Rosen (nonlocal quantum effect)
ERCP	- Endoscopic Retrograde CholangioPancreatography
ERP	- Enterprise Resource Planning
ESC	- Escape (ASCII 27)
ESG	- Experimental Study Group (MIT)
ET	- Epsilon Theta (MIT ILG)
ETOPS	- Engines Turn Or Passengers Swim
ETOPS	- Extended Twin-engine OPerationS
F	- Fluorine
F2F	- Face to Face
FAIK	- For All I Know
FAQS	- Friendly Alliance of Queers and Straights [org, MIT]
FBC	- Financial Business Consultant
FCP	- Fire Control Panel
FCU	- Federal Credit Union
FDC	- Freshman Defense Corps (MIT)
FE	- Field Engineer
FE	- Iron
FEE	- Freshman Essay Evaluation (MIT)
FFF	- Fetish Fair Fleamarket
FIAWOL	- Fandom Is A Way Of Life
FIIK	- Fuck If I Know
FINROP	- Fixed In Next Revision Of Patch
FLL	- Frequency Locked Loop (compare PLL)
FLT	- Fermat's Last Theorem
FMTYERWTK - Far More Than You Ever Really Wanted To Know
FOP	- Flowery Orange Pekoe (cf BOP)
FOUO	- For Official Use Only
FRED	- Flow Random Early Detection [Networking]
FS	- Field Separator (ASCII 28)
FS	- File Server (AFS)
FSILG	- Fraternity/Sorority/Independent Living Group
FSVO	- For Some Value(s) Of
FTD	- Florists Transworld Delivery [corporate name]
FTE	- Full Time Equivalent (Employee)
FTGOS	- Further The Goals Of SIPB
FTR	- For The Record
FTSO	- Fuck The Skull Of
FUBAR	- Failed UniBus Address Register (VAX)
FVWM	- Feeble Virtual Window Manager
FVWM	- F* Virtual Window Manager
FYIV	- Fuck You, I'm Vested
GAFIATE	- (to) Get Away From It All
GAS	- GNU ASsembler
GBIC	- Gigabit Interface Converter (module used with Sun hardware)
GCA	- Graphic Communications Association (SGML)
GCD	- Greatest Common Divisor
GCT	- Grand Central Terminal (NYC)
GDR	- German Democratic Republic (East Germany)
GGI	- General Graphics Interface
GHB	- gammahydroxybutyrate
GIMP	- GNU Image Manipulation Program
GIPB	- GTE Internetworking Powered by BBN (compare SIPB)
GL	- Graphics Library
GLM	- Gate Level Model (Sun driver for SYmbios 53c875)
GM	- Genetically Modified
GML	- Goldfarb, Mosher, Lorie (IBM)
GMP	- GNU Massive Precision (GNU big number library)
GMS	- Global Messaging System
GMTA	- Great Minds Think Alike
GNOME	- GNU Network Object Model Environment
GS	- Group Separator (ASCII 29)
GSN	- Gigabyte System Network (HIPPI-6400)
GSR	- Gigabit Switch Router
GSSAPI	- Generic Security System Application Programming Interface
GSW	- Gun Shot Wound
GTK	- GIMP Toolkit
GX	- General Exhaust (MIT PP)
GX	- Graphics Accellerator
GaMIT	- Gays, lesbians, bisexuals, transgendered, and friends At MIT
H	- Hydrogen
HAND	- Have A Nice Day
HASS	- Humanities, Arts, and Social Sciences (MIT)
HDPE	- High Density Polyethylene (Recycle code #2)
HE	- Helium
HE	- High Explosive
HFS	- Housing and Food Services, Department of (MIT)
HHGTTG	- HitchHiker's Guide To The Galaxy (book)
HHOK	- Ha Ha, Only Kidding
HHOS	- Ha Ha, Only Serious
HHVF	- Ha ha, very funny
HK	- Hong Kong
HMM	- Hidden Markov Model
HMMV	- High Mobility Multipurpose Wheeled Vehicle (US Military)
HOV	- High Occupancy Vehicle
HPLC	- High Performance Liquid Chromatograph[y]
HRO	- Ham Radio Outlet (store in New Hampshire)
HSN	- Home Shopping Network
HSSI	- High Speed Serial Interface (up to ~50Mbps)
HSV	- Hue Saturation Value (colour encoding scheme)
HSV	- Huntsville/Decater, AL International Airport
HTF	- Hard To Find (slang, eBay)
HTML	- HyperText Markup Language
HVRL	- High Voltage Research Laboratory
HW	- Hot Water (Real-Estate)
IAC	- Interpret As Command (Telnet)
IANAL	- I Am Not a Lawyer
IAP	- Independent Activities Period (MIT)
IBC	- Intependent Breweries Company
ICANN	- Internet Corporation for Assigned Numbers and Names 
ICB	- Internet Citizens' Band
ICQ	- I Seek You (communications program by Mirabilis)
ICU	- Intensive Care Unit
ICYWC	- In Case You Were Curious
IEICE	- Institute of Electronics, Information and Communication Engineers
IERS	- International Earth Rotation Service
IFC	- InterFraternity Council
IFFT	- Inverse Fast Fourier Transform
IGRP	- Interior Gateway Routing Protocol
IHOP	- International House Of Pancakes
IHTFP	- I Hate This Fucking Place
IHTFP	- I Hack To Find Places
IHTFP	- I Have Truly Found Paradise
IHTFP	- See <http://www.mit.edu/people/mjbauer/ihtfp.html>
IINM	- If I'm Not Mistaken
IIR	- Infinite Impulse Response
IIRC	- If I Recall Correctly
ILA	- In-Line Amplifier
ILG	- Independent Living Group (MIT)
ILM	- Industrial Light & Magic (special effects company)
ILP	- Instruction-Level Parallelism
ILP	- Integer Linear Programming
ILTFP	- I Love This Place (c.f. IHTFP)
IMAIL	- Interdepartmental Mail
IMPP	- Inner Mongolian People's Party
IMPP	- Instant Messaging and Presence Protocol
INWG	- InterNetworking Working Group [Internet history]
IOTTMCO	- intuitively obvious to the most casual observer 
IPO	- Intellectual Property Office (MIT)
IPSEC	- IP SECurity
IRDF	- Independent Residence Development Fund (MIT)
IS	- Information Systems (MIT)
ISO	- Incentive Stock Option
ISO	- International Organization for Standardization (not an acronym)
ISP	- Integrated Studies Program (MIT)
ISRN	- International Standard Technical Report Number
ISTM	- It Seems To Me 
ISTR	- I Seem To Recall
ITAR	- International Traffic in Arms Regulation (succeeded by EAR)
ITLT	- Information Technology Leadership Team (MIT IS)
ITPIR	- If The Price Is Right 
ITYM	- I Think You Mean
IUPAC	- International Union of Pure and Applied Chemistry
IW	- Information Warfare
JATO	- Jet Assisted Take Off 
JBOD	- Just a Bunch of Disks (compare RAID)
JC	- Just Curious
JCL	- Junior Classical League
JCT	- JunCTion. (highway abbrev.)
JVM	- Java Virtual Machine
KADB	- Kerberos Authentication DataBase (AFS)
KAS	- Kerberos Authentication Server (AFS)
KDE	- K Desktop Environment (CDE clone)
KFC	- Kentucky Fried Chicken
KIT	- keep in touch
KNF	- Kernel Normal Form (4.4BSD code style)
KNI	- Katmai New Instructions (Intel Pentium III, renamed SSE on release)
KPOP	- Kerberized Post Office Protocol
KS	- Kansas
KVM	- Kernel Virtual Memory
KVM	- Keyboard/Video/Mouse
L10N	- LocalizatioN (see i18n)
LALR	- LookAhead Left Recursive 
LARP	- Live Action Role Playing
LART	- Luser Attitude Readjustment Tool (Usenet)
LASIK	- Laser-In-SItu Keratomileusis [vision correction]
LBJ	- Lyndon Baynes Johnson
LBPIA	- Toronto's Lester B. Pearson International Airport
LCM	- Lazy Code Motion
LCM	- Least Common Multiple
LDPE	- Low Density Polyethylene (Recycle code #4)
LDR	- Long Distance Relationship
LDS	- Labor Distribution System [MIT?]
LEES	- Lab for Electronic and Electromagnetic Systems 
LFSR	- Linear Feedback Shift Register (crude pRNG)
LGC	- Living Group Council (MIT)
LGPL	- Lesser [formerly Library] General Public License (GNU)
LI	- Lithium
LL	- MIT Lincoln Labs
LLC	- Limited Liability Company
LMAO	- Laughing My Ass Off
LNF	- Late Night Food
LNP	- Local Number Portability [telecom]
LOPIP	- list of periodic informational postings (FAQs)
LP64	- Long, Pointer 64 bit
LPOS	- Losing Piece of Shit
LR	- Left Recursive
LRF	- Little Rubber Feet
LS	- Locking Shift
LS1	- Locking Shift 0 (ASCII 15)
LS1	- Locking Shift 1 (ASCII 14)
LZ	- Lempel-Ziv (compression)
MA	- Massachusetts
MANET	- Mobile Ad-hoc NETwork
MASH	- MAke SHell (SIPB)
MASH	- Multimedia Application SHell (UCB)
MB	- Manitoba (Canadian Province)
MBE	- Mail Boxes Etc.
MBR	- Master Boot Record
MBT	- Minuteman Bike Trail
MBZ	- Must Be Zero
MCD	- milli-candela (unit of luminescence)
MCNS	- Multimedia Cable Network System
MDA	- 3,4-methylenedioxyamphetamine
MDA	- Mail Delivery Agent
MDD	- Modular Dependency Diagram
MDI	- Metered Dose Inhaler
MDMA	- 3,4-methylenedioxymethamphetamine
MEM	- MicroElectroMechanical
MEPAS	- multifunctional expandable portable audio system
METAR   - Aviation Routine Weather Report (NWS standard, trans. French)
MEU	- (Henry Fowler's) Modern English Usage (OUP, ed. by R.W. Burchfield)
MFS	- Metropolitan Fiber Systems (telco)
MG	- Magnesium
MGL	- Massachusetts General Laws
MH	- (RAND/UCI) Mail Handler
MILSPEC	- Military Specification
MINK	- MINimum Kerberos installation (M.I.T., Windows)
MITERS	- MIT Electronic Research Society
MITES	- Minority Introduction To Engineering and Science (MIT)
MITOC	- MIT Outing Club
MITRFC	- MIT Rugby Football Club
MITSFS	- MIT Science Fiction Society
MITSO	- MIT Symphony Orchestra
MLK	- Martin Luther King, Jr.
MMM	- Mythical Man Month (Brooks/IBM)
MOBO	- MOtherBOard
MOS	- Miracle of Science Bar and Grill
MOT	- Member of The Tribe
MP3	- MPEG 1/2 Layer 3 Audio Format
MQ	- Mail Quote (as in -c sipb -i mq)
MRE	- Meal Ready to Eat
MSRP	- Manufacturer's Suggested Retail Price
MST3K	- Mystery Science Theater 3000 (TV show)
MT	- Magnetic Tape
MTL	- Microsystems Technology Laboratories [MIT]
MULE	- MULti-lingual Enhancement to GNU Emacs
MUSH	- multi-user shared hallucination
MYOB	- Mind Your Own Business
N	- Nitrogen
NA	- Sodium
NAFTA	- North American Free Trade Association
NANOG	- North American Network Operators' Group
NARF	- Nifty Animaniacs Reference File (alt.tv.animaniacs FAQ)
NAWM	- Not A Window Manager (program)
NCAA	- National Collegiate Athletic Association
NDBM    - New DataBase Manager
NE	- Nebraska
NE	- Neon
NEC	- North East Corridor [amtrak]
NF	- Newfoundland (Canadian Province)
NFA	- Nondeterministic Finite Automaton
NFP	- Natural Family Planning
NIPRNET	- Unclassified (but Sensitive) Internet Protocol Routing NETwork (.mil)
NLANR	- National Laboratory for Applied Network Research
NMSU	- New Mexico State University
NODE	- New Oxford Dictionary of English
NP	- Non-Player (see also NPC)
NP	- Noun Poetry
NQ	- News/Netnews Quote (as in -c sipb -i nq)
NSL	- name service layer
NT	- Northwest Territory (Canadian Territory)
NUL	- NULl (ASCII 0)
NUMA	- Non Uniform Memory Architecture
NWO	- New World Order
O	- oxygen
OASIS	- Organization for the Advancement of Structured Information Standards 
OCMG	- Office Computing Management Group [MIT I/S]
ODSA	- Office of the Dean for Student Affairs (MIT) [replaced by ODSUE]
ODSUE	- Office of the Dean for Students and Undergraduate Education (MIT)
OIC	- Oh, I see 
OIG	- Orbital Information Group (NASA) 
OIG	- Office of Inspector General (NASA)
OISE	- Ontario Institute for Studies in Education
OK	- Oklahoma
OKC	- Oklahoma City
OLTA	- On-Line TA
ON	- Ontario (Canadian Province)
ONHWP	- Ontario New Home Warranty Program
OOC	- Out Of Curiosity
OOTD	- One Of These Days
OPP	- Ontario Provincial Police
OPSEC	- Operations Security
OQ	- [SIPB] Office Quote (as in -c sipb -i oq)
ORBS	- Open Relay Blocking System
ORC	- Obscure Reversing Concatenation
ORK	- Order of Random Knights (MIT)
OSS	- Open Sound System (distributed with Linux kernel)
OSS	- Open Source Software
OSSD	- Ontario Secondary School Diploma
OUP	- Oxford University Press
PA	- Palo Alto (California)
PAG	- Process Authentication Group [AFS]
PCP	- Pairwise Condorcet Preferential (political science)
PDA	- Public Display of Affection
PDF	- Portable Document Format [Adobe Acrobat]
PDR	- Physician's Desk Reference
PDR	- Private Dining Room (MIT, one of the rooms on the 3rd floor of W20)
PETE	- Polyethylene terephthalate (Recycle code #1)
PF	- Protocol Family (sockets)
PGCC	- Pentium Gnu C Compiler 
PH	- PentHouse (Real-Estate)
PHB	- Per-Hop Behavior (IETF Differentiated Services)
PHB	- Pointy-Haired Boss (Dilbert)
PHTLS	- Pre-Hospital Trauma Life Support (Medical)
PIC	- Position Independent Code
PIF	- Program Information File (Windows)
PITA	- Pain In The Ass
PKB	- Pot [calling the] Kettle Black
PKC	- Public-Key Cryptography
PL	- Private Line [Motorola]
PLOKTA	- Press Lots of Keys to Abort
PMS	- Pre-menstrual syndrome
PNG	- Persona Non Grata
POS	- Packet Over SONET
POS	- Part of Speech
POS	- Piece of Shit
POTUS	- President Of The United States
PP	- Polypropylene (Recycle code #5)
PPV	- Pay Per View
PR	- Problem Report
PRDB	- PRotection DataBase (AFS)
PRK	- Photorefractive Keratectomy [vision correction]
PRNG	- Pseudo-Random Number Generator (pRNG)
PS	- Polystyrene (Recycle code #6) 
PSCC	- Penn. Station Control Center [amtrak]
PSU	- the Pennsylvania State University
PTS	- ProTection Server (AFS)
PVD	- ProViDence, RI (T.F. Green State Airport)
QC	- Quebec (Canadian Province)
QCD	- Quantum ChromoDynamics
QM	- quantum mechanics
QP	- Quoted Printable (MIME, RFC2045)
QW	- quantum well
R2RS	- Revised^2 Report on the Algorithmic Language Scheme
R3RS	- Revised^3 Report on the Algorithmic Language Scheme
R4RS	- Revised^4 Report on the Algorithmic Language Scheme
RA	- Remembrance Agent
RA	- Routing Arbiter
RBR	- Reserve Book Room
RCA	- Residence and Campus Activities (MIT) [replaced by RLSLP]
RED	- Random Early Detection [Networking]
RFO	- Reason For Outage
RHPS	- Rocky Horrow Picture Show
RI	- Representation Invariant
RICO	- Racketeer Influenced and Corrupt Organizations (legal)
RJ	- Registered Jack (as in RJ11, RJ45, etc.)
RK	- Radial Keratotomy [vision correction]
RL	- Real Life
RLSLP	- Residence Life and Student Life Programs (MIT)
RM	- ReMove
RNG	- Random Number Generator
RNO	- Reno, Nevada
ROFL	- Rolling On the Floor Laughing (more commonly ROTFL)
ROFLMAO	- Rolling on the Floor Laughing my Ass Off (more commonly ROTFLMAO)
ROTFL	- Rolling On The Floor Laughing
ROTFLMAO	- Rolling On The Floor Laughing My Ass Off 
ROTFLOL	- Rolling On The Floor Laughing Out Loud
ROU	- Rules of Use (Athena, MITnet)
RPD	- RePlay Daemon (part of the olc server)
RPS	- Rock, Paper, Scissors
RPS	- Routing Policy Specification
RRR	- Reuse, Reduce, Recycle
RS	- Record Separator (ASCII 30)
RSI	- Research Science Institute
RSSC	- Residence Selection Steering Committee
RSVP	- Resource ReSerVation Protocol
RTA	- Rapid Transit Association [mit]
RTFSA	- Read the Stock Answer
RTI	- Random Technical Item (MIT Assassins' Guild)
RTO	- Retransmission TimeOut (TCP)
RTP	- Research Triangle Park (near Raleigh, NC, and Duke University)
RTSP	- Real-Time Streaming Protocol
RTW	- Rule The World
RVD	- Remote Virtual Disk
SAC	- Strategic Advisory Committee (MIT)
SAFE	- Security And Freedom through Encryption (bill)
SANE	- Scanner Access Now Easy
SASL	- Simple Authentication and Session Layer (RFC 2222)
SAX	- Simple API for XML
SCA	- Society for Creative Anachronism
SCEP	- Student Committee on Educational Policy (MIT UA)
SCFL	- Source Coupled FET Logic
SCL	- Senior Classical League
SCLC	- Southern Christian Leadership Coalition (civil rights org)
SCOTUS	- Supreme Court of the United States
SCP	- Secure CoPy (SSH)
SCSH	- SCheme SHell
SCSL	- Sun Community Source License
SCWM	- SCheme Window Manager
SDS	- Software Devices and Systems (MIT LCS research group)
SDS	- Students for a Democratic Society
SEA	- Seattle/Tacoma, Washington
SEAL	- SEa, Air, and Land team (USN)
SEP	- Somebody Else's Problem
SETA	- Students for the Ethical Treatment of Animals
SFDH	- Shit Flows Down Hill
SFP	- Self-Fulfulling Prophecy
SG	- Specific Gravity
SHIT	- Special High-Intensity Training
SI	- Shift In (ASCII 15)
SI	- Systeme Internationale ("the metric system")
SIBP	- A common mispelling of SIPB
SICP	- Structure and Interpretation of Computer Programs (MIT/6.001)
SIGACT	- Special Interest Group on Algorithms and Computation Theory (ACM)
SIGCOMM	- Special Interest Group on data COMMunication (ACM)
SIGGRAPH	- Special Interest Group on Computer Graphics (ACM)
SIK	- Society for Interactive Killing (LARP)
SIL	- Summer Institute of Linguistics
SIOD	- Scheme In One Defun
SIPRNET	- Secret IP Routing Network
SJ	- San Jose
SJC	- Supreme Judicial Court
SK	- Saskatchewan (Canadian Province)
SLA	- Service Level Agreement (IETF Differentiated Services)
SLOGIN	- Secure Login (SSH)
SMIL	- Synchronized Multimedia Integration Language
SMR	- sipb-machine-room@mit.edu
SNL	- Saturday Night Live
SO	- Shift Out (ASCII 14)
SOHO	- Small Office / Home Office
SOS	- Scheme Object System
SOSP	- Symposium on Operating Systems Principles
SPADE	- Simple Protocol Application Data Encoding
SPAMIT	- Stupid People At MIT
SPECTRE	- SPecial Executive for Counterintelligence, Terrorism, Revenge and Extortion
SPKAC	- Signed Public Key And Challenge (Netscape Certificate Generation)
SPODSA	- Secret Police of the Office of the Dean for Student Affairs (MIT) [presumed defunct]
SPP	- Service Provisioning Policy (IETF Differentiated Services)
SR	- source-reviewers@mit.edu
SRC	- Society for Retro-Computing (MIT)
SRC	- SouRCe
SRVD	- System Remote Virtual Disk
SSC	- Student Services Center (MIT)
SSDD	- Same Shit, Different Day
SSE	- Streaming SIMD Extensions (Intel Pentium III, was KNI before release)
SSH	- Secure SHell
SSS	- Sinusoidal Steady State
ST	- Scheduled Transfer (GSN)
STBY	- Sucks To Be You
STFU	- Shut The Fuck Up
STTOS	- Star Trek: The Original Series, "ST:TOS"
STW	- Save The World
SUB	- SUBstitute (ASCII 26)
SUP	- Software Upgrade Protocol
SUT	- Stupid User Tricks
SWAG	- Serious Wild-Assed Guess
SWAK	- Sealed With A Kiss
SWAT	- Special Weapons And Tactics
SWIP	- Shared WhoIs Project
SWORD	- Secret World Organization for Retribution and Destruction
SWOT	- Strenghts, Weaknesses, Opportunities, and Threats [MIT I/S]
SWS	- Silly Window Syndrome (TCP)
T&E	- Test & Evaluation
TAF     - Aerodrome Forecast (NWS standard, trans. French)
TAFKAP	- The Artist Formerly Known As Prince
TAI	- International Atomic Time
TCA	- Tech Community Association (MIT)
TCA	- Traffic Conditioning Agreement (IETF Differentiated Services)
TCAT	- Tokyo City Air Terminal
TCL	- Tool Command Language
TDA	- Tax Deferred Annuity
TELAC	- Technology Laboratory for Advanced Composites [MIT]
TEM	- Transmission Electron Microscopy
TEOTWAWKI	- The End Of The World As We Know It
TEP	- Tau Epsilon Phi (MIT fraternity)
TETAZOO	- Third East Travelling Animal Zoo
TFM	- The Fucking Manual
TGIF	- Thank Goodness It's Friday
TGV     - Le Train à Grande Vitesse (300kph European high speed train)
THA	- Technology Hackers Association (MIT)
THC	- tetrahydrocannabinol
THOK	- The Herd Of Kittens
THOK	- Thundering Horde Of Kittens
TIC	- Tongue In Cheek
TLC	- Thin Layer Chromatograph[y]
TLD	- Top Level Domain (DNS)
TLO	- Technology Licensing Office (MIT)
TMBG	- They Might Be Giants (music group)
TMI	- Too Much Information 
TMJ	- Temporo-Mandibular Joint
TMTOWTDI- There's More Than One Way To Do It [often refers to Perl programming]
TNT	- Turner Network Television
TO	- Ticked Off
TO	- Toronto, Ontario
TSS	- Toxic Shock Syndrom
TSSO	- Temporal Security (Agency) Special Operations (Strike Team Four) [performance hack]
TTC	- Toronto Transit Commission
TTP	- The TTP Project (Dilbert)
TTPSSHVARWN	- Tech Tool, Problem Set Solvers, Hackers, and Volunteer Air Raid Watchers' Net
TTYL	- Talk To You Later
TTYS	- Talk To You Soon 
TTYT	- Talk To You Tomorrow
TYVM	- Thank You Very Much
UA	- Undergraduate Association (MIT)
UAA	- Undergraduate and Academic Affairs (MIT)
UBE	- Unsolicited Bulk Email (Usenet, Spam)
UCMJ	- Uniform Code of Military Justice (US)
UF	- User Friendly (see http://www.userfriendly.org/ )
UMB	- University of Massachusetts at Boston
UML	- Unified Modeling Language (Booch/Rumbaugh/Jacobson)
UMOC	- Ugliest Manifestation On Campus (MIT, contest run by APO)
UNM	- University of New Mexico
UPN	- united paramount network (TV)
UROP	- Undergraduate Research Opportunities Program (MIT)
URVD	- User Remote Virtual Disk
USAMAH	- Universal Systematic Access Mathematical Anonymity Hierarchy
USARIEM	- U.S. Army Research Institute of Environmental Medicine
USC	- United States Code
USCA	- United States Court of Appeals
USP	- United States Pharmacopeia
USRA	- Universities Space Research Association
USSC	- United States Supreme Court
UT	- University of Toronto
UTC	- coordinated universal time
UTI	- UUNET Technologies, Incorporated.
UTI	- Urinary Tract Infection
UTSL	- Use The Source, Luke
UW	- University of Waterloo
UWS	- Upper West Side (NYC)
VDSL	- Very high rate Digital Subscriber Line
VIP	- Versatile Interface Processor (Cisco 7xxx interface card)
VLDB	- Volume Location DataBase (AFS)
VLSM	- Variable Length Subnet Mask
VOS	- VOlume Server (AFS)
VQF	- Vector Quantization Format (Audio)
VRM	- Voltage Regulator Module (Intel Pentium)
VT	- VaporTalk
VT	- Vermont
VT	- Vertical Tab (ASCII 11)
VTWM	- Virtual Tab Window Manager
VUI	- Voice User Interface
W3C	- World Wide Web Consortium [org]
WAP	- Wireless Application Protocol
WB	- WhiteBoard (Multicast application)
WHATS	- lookup acronym/abbreviation in database
WIBNI	- Wouldn't It Be Nice If
WILG	- Women's Independent Living Group (MIT ILG) 
WKB	- Wentzel-Kramers-Brillouin semi-classical approximation (QM)
WLOG	- without loss of generality
WMBR	- Walker Memorial Basement Radio (MIT)
WOB	- Waste of Bandwidth
WQ	- Web Quote (as in -c sipb -i wq)
WRED	- Weighted Random Early Drop [Networking]
WSRR	- Women's Studies Reading Room (MIT, inside Hayden Library, 14E-311)
WTH	- Who/What/When/Where/Why The Hell
WTMI	- Way Too Much Information (qv TMI)
WWF	- World Wildlife Fund
WWF	- World Wrestling Federation
WWIV	- World War IV (BBS software)
WWJD	- What Would Jesus/jhawk Do?
WWWWW	- Which Was What We Wanted
XBEL	- XML Bookmark Exchange Language
XML	- eXtensible Markup Language (SGML descendant)
XMMS	- The X MultiMedia System, formerly known as x11amp.
XQL	- XML Query Language
XSL	- eXtensible Stylesheet Language (XML)
Y2K	- Year 2000
YAPL	- Yet Another Programming Language
YK	- Yukon (Canadian Territory)
YKINMK	- Your Kink Is Not My Kink
YKINMKBTOK	- You Kink Is Not My Kink But That's OK
YKINMKBYKIOK	- Your Kink Is Not My Kink But Your Kink Is OK
YKWIM	- You Know What I Mean
YKYBHTLW	- (c.f <URL:ftp://ftp.cetis.hvu.nl/pub/koos/humor/ykybhtlw>)
YKYBHTLW	- You Know You've Been Hacking Too Long When [...]
YKYWT	- You Know You Want To
YM	- You Mean/Misspelled
YODL	- Yet Oneother Document Language
YT	- Yours Truly
YWGTTM	- You Will Go To The Moon (Album by Moxy Fruvous)
YWLIIYL	- You Will Like It If You Like
YYZ	- Toronto's Lester B. Pearson International Airport
ZHM	- Zephyr Host Manager
ZION	- ZWGC Is Obsolete Now
ZKS	- Zero Knowledge System[s]
ZWGC	- Zephyr WindowGram Client