%-) yes, be very careful which ones you delete. I found out the hard way not to delete the MS ones. When I did, most text presentations went whacky- and down to about 2 or 4 point text size. Needed a magnifying glass to see the letters !! Had to reconfigure a few things and go a few places that I never went before with tech support. It was in the early days of my computer association, about 2 years ago and I can't remember the specifics. (A great reason to write things down that help you fix problems.) Basically, don't delete anything with a Big Red A in the middle of the icon, (on 98 anyway)-these are fonts that seems to be part of the OS> I believe the A type fonts need a page description language to work with, whereas a True Type font has code written inside the font data itself and bypasses the need for a language to tell the printer what to print.
To Mcvp and Ersb right on with good info and insights, thx.