virtual memory is everywhrer and it is no where. its beyound the seven seas and inside the core of the earth and at the forepoint of technology....... ok ok cutting the c*ap
its the space alloted by your os on your hard drive. think of it a virtual ram chip. it allows the smooth functioning of your system. you can acces it for xp by right clicking "my computers">properties >advanced tab> settings> advanced tab> vrtual mamory.
for windows 98 its right clicking "my computers">properties >advanced tab> uncheck let windows manage my virtual memory> (might not b exact. really dont remember much about 98. its been a long time.)
MMC is short for multimedia memory card. they are basicaly solid state flash memories used in mobiles, digicams,etc.s they are small rectangular devices about the size of a stamp and the thickness of cardboard.