three-quarters of the market. this personal computer costs about $1,400 and fits nicely on a desk corner. duplicating its performance five years ago would have cost $75,000 and involve the unit the size of a large refrigerator. >> when the average american thought computer, they thought ibm. it made these mainframe computers that ran pretty much everything. >> ibm was one of the most powerful corporations in america. and in technology, it was the most powerful company that had ever existed in technology. >> because of this activity in personal computers, it started to make ibm look like it was somewhere behind the 8-ball. >> they look at the apple ii and say, huh, we could build one of those. we built computers that put men on the moon. we'll get that business, squash these guys, no problem. >> ibm, international business machines, has entered the small computer market for the first time. >> the idea of the small computer has become so big that the giant of computer companies,