IBM Personal Computer XT - Wikipedia, the free encyclopedia. My first real office computer (that sat on my desk in my office) was an IBM PC with dual 5 inch floppy disks around 1986. They had been out since 1981; but, I was still with a firm and we had a kitchen sized monstrosity called an MTST from IBM. Think refrigerator sized automatic typewriter. The green screened text based PC was a revelation. I got used to DOS, and text commands, and loading one floppy for the Operating System, and using the other to store letters, pleadings and documents. Then, hard drives came out on personal computers in 1983, and, by 1987 or 1988, I had a PC XT, and the hard drive could store mountains of documents, by 1980s standards. Here is a photo of one of these early computers. Takes me back.