Love it or hate it... this one changed the world. IBM has posted some historical information about the original IBM PC on their site. I still miss that green screen... it had the sharpest characters I have ever seen on a CRT (though not as good as modern LCD displays).
This was the Cadillac of PC's in the day. The $1,565 price bought a system unit with 16K of memory, a keyboard and a color/graphics capability. Options included a display, a printer, two diskette drives, extra memory, communications, game adapter and application packages — including one for text processing.