The storing of data in microcomputer is achieved with the help of fixed disk or hard disk whereas in mainframes and mini computers data are stored in Electronic Data Storage (E.D.S.) unit.
The E.D.S. unit looks like a freeze. These unit consists of exchangeable disks so it is also referred as Exchangeable Disk System (E.D.S.). The hard disks kept in E.D.S. unit are removable or exchangeable ( i.e. not fixed ). These disks consists of 6,8, or 11 metallic circular Plate which can store 8, 10 or 20 corers of characters or numbers respectively. This E.D.S. unit is connected to Central Processing Unit (C.P.U.), Card Reader or Tape Unit. Depending on the instructions received from CPU, the E.D.S. unit can copy, store erase or print the data from tape or card reader unit. The number of E.D.S. may vary from 2 to 8 in a mini computer.
The E.D.S. unit looks like a freeze. These unit consists of exchangeable disks so it is also referred as Exchangeable Disk System (E.D.S.). The hard disks kept in E.D.S. unit are removable or exchangeable ( i.e. not fixed ). These disks consists of 6,8, or 11 metallic circular Plate which can store 8, 10 or 20 corers of characters or numbers respectively. This E.D.S. unit is connected to Central Processing Unit (C.P.U.), Card Reader or Tape Unit. Depending on the instructions received from CPU, the E.D.S. unit can copy, store erase or print the data from tape or card reader unit. The number of E.D.S. may vary from 2 to 8 in a mini computer.
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