clearing search history in win 98

i am at work trying to clear the history and was checking the admin website… i googled it with internet explorer… just to see what happenens… but thats not the thing that wrong…
i have done it before but cant remember how i did it… i need to clear the search history before i give this computer i am working on to the person who it belongs to… i dont want them getting on the website (even if its password protected) and messing up the whole system
to sum that up:
windows 98
i need to clear the search history
i am a forgetfull clown
the main browser is windows internet explorer
other browsers incluse but arnt limited to opera netscape and firefox
i searched things that are important to the buisnes i work at and need to clean the traces off
umm i cant think of anyhting else important