Optical Memory Optical memories or Optical disks are alternate mass storage devices with huge capacity [up to 20 GB]. Higher density is achieved through tightly focused lasers which can access a very small storage area. Information is written to or read from an optical disk using a laser beam. Only...
Semiconductor [Main] Memory All computers except very small computers contain both semiconductors as well as magnetic memory. All modern computers use semiconductor memory as its main memory [Primary Memory]. Semiconductor memory is known as Random Access Memory [RAM] because any part of the memory can be accessed for reading and...
Introduction The data and instructions which are entered into the computer system through input devices [keyboard, mouse, etc.] have to be stored inside the computer before the actual processing starts. Similarly, after processing, the results produced by the computer must be kept somewhere inside the computer system before being passed...
Introduction Computer is the most powerful tool man has ever created. Computers are used in almost every working place in modern times that is schools, colleges, offices, railways, banks, industries, hospitals, etc. The word “Computer“ comes from the word “Compute“ which means to calculate. So a computer can be considered as...