WHAT IS A COMPUTER? an electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals. Computer can also be defined in terms of functions it can perform. A computer can i) accept data,ii)store data, iii) process data as desired, and iv) retrieve the stored data as and when required and v) print the result in desired format. The major characteristics of a computer are high speed, accuracy,diligence, versatility and storage. CHARACTERISTICS OF COMPUTERS The characteristics of computers that have made them so powerful and universally useful are speed, accuracy, diligence, versatility and storage capacity. Let us discuss them briefly. Speed Computers work at an incredible speed. A powerful computer is capable of performing about 3-4 million simple instructions ...
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CLASSIFICATION BASED ON SIZE AND CAPABILITY
a. Microcomputers (Personal Computer) A microcomputer is the smallest general purpose processing system. The older pc started 8 bit processor with speed of 3.7MB and current pc 64 bit processor with speed of 4.66 GB. Examples: - IBM PC s, APPLE computers Microcomputer can be classified into 2 types : 1 . Desktops 2. Portables The difference is portables can be used while travelling whereas desktops computers cannot be carried around. The different portable computers are: - 1) Laptop 2) Notebooks 3) Palmtop (hand held) 4) Wearable ...
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