Plant fibers usually consist of structural carbohydrates such as cellulose in cell walls. Composed of repeating glucose units in long, single strands, cellulose cannot be digested by enzymes in the human intestine. Other plant fiber components include hemicellulose and pectin.
Mac System Software. Mac OS was named by the company Apple as Mac System Software in the beginning, a specially designed operating system only for 68K first Motorola processors. With own Macintosh hardware, Mac OS takes up a special role in the world of desktop systems. The first version was System 1 and appeared bundled with the Mac in 1984.
1 CPU - This stands for the Central Processing Unit of the computer. 2  MAC - This is an abbreviation for Macintosh, which is a type of personal computer made by the Apple Computer company. 3  OS - This is the Operating System of the computer. 4  PC - This is the abbreviation for personal computer.