#Make a ksh93 prompt look like a typical bash prompt. This works ONLY with ksh93.
PS1='$(print -n "${USER}@`hostname -s`:";if  then; print -n "~${PWD#$HOME}"; else; print -n "$PWD";fi;print "$ ")'

#Make NetBSD's /bin/ksh prompt look like a typical bash prompt. Useful at sdf.org.
export TILDE='~'
PS1=$USER@$(hostname -s):'${TILDE[(1-0${PWD@([!/]*|$HOME*)}1)]:-}${PWD#$HOME}$ '

#A simple prompt that works with all variants of ksh.
PS1=$USER@$(hostname -s):'$PWD> '

#Regardless of how you set your prompt, you may want to add:
set -o emacs
alias ls='ls -F'