The modern world #1 (personal computer)
PERSONAL COMPUTERS (PCs) fall into two main types: IBM - compatible PCs, simply known as PCs, and Apple Macintosh PCs, known as "Macs". They differ in the way files and programs, and the user's access to them, are organized, and programs must be tailored for each type. However, in most other respects PCs and Macs have much in common. Both contain microchips, or integrated circuits that store and process data. The "brain" of any PC is a chip known as the central processing unit (CPU), which pe
