Shell Programming and Scripting

Install Ubuntu or SuSe and use it.....

Really I have used cygwin X and it works for most things. But If I really want to know I use a UNIX system.

Chubler_XL hmm my cygwin install does clear ok. did you try tput clear. Maybe just missing the alias for it.

bash or ksh is not solution for your all problems. You need install more softwares from cygwin setup. Bash and ksh include only builtin commands, not externals.
You can do search in your cygwin setup. Ex. clear is part of default. (/bin/clear.exe).
tput is good command to use if you need lot of terminal servives like clear, bold, move cursor, ...
tput need terminfo.

Code:

tput clear   # works fine in every environment
# better way
clear=$(tput clear)  # run once, save output string and use it
#and then use 
echo $clear

Of cource it's always possible install some virtual machine environment to your Win system and then install some Linux. But if you need only "*nix command environment", then cygwin is okay solution.

Clear is part of ncurses package, here is the first result of a quick "cygwin clear command" google that shows how to get it installed.