hard drives first appeared in 1976,and now nearly all desktop computers have them.These billions of hard disks do one thing well they store changing digital information in a relatively permanent form. They give computers the ability to remember things when the power goes out.
An optical drive, commonly referred to as a CD-ROM or DVD-ROM drive, is the drive in the computer that reads and writes optical discs. Optical discs are storage devices used to distribute software and other consumer media.
TFT monitor uses thin-film transistor technology for the ultimate LCD display. LCD monitors, also called flat panel displays.A typical 17-inch TFT monitor has about 1.3 million pixels and 1.3 million transistors.
The computer you are using to read this page uses a microproccesor to do its work.The microprocessor is the heart of any normal computer.A microprocessor -- also known as a cpu or central processing unit -- is a complete computation engine that is fabricated on a single chip. The first microprocessor was the Intel 4004, introduced in 1971.
RAM is considered "random access" because you can access any memory cell directly if you know the row and column that intersect at that cell.