4. The Radio Shack TRS-80 Color Computer (also called Tandy Color Computer, or CoCo) was a home computer launched in 1980. It was one of the earliest, and most successful, of the early generation of personal computers marketed for home use in English-speaking markets. While the model was eventually eclipsed by the onset of the IBM PC clones, enthusiasts have continued to affectionately tinker with the "CoCo

5. A personal computer may be a desktop computer, a laptop, a tablet PC, or a handheld PC (also called a palmtop). Website: http://en.wikipedia.org/wiki/Personal_computer.