Computer Types

•Digital Computer is a fast electronic calculating machine that

– accepts digitized input information,

–processes it according to a list of internally stored instructions,

–and produces the resulting output information.

•Many types of computers exist that differ widely in Size, Cost,Computational Power and intended Use

1.Personal Computer/ Desktop computers

2.Portable Notebook Computers

3.Work Stations

4.Enterprise System Servers

5.Super Computers

Block diagram of a digital computer

Functional Units

•A digital computer consists of five functionally independent parts.

–Input

–Output

–Memory Unit

–Arithmetic and Logic Unit

–Control Unit