Thursday, March 20, 2014

History of computer

History of computer : 'past to present'

       According to the present context, computers have become a very essential too so, without computers it is quite difficult to perform any tasks easily and also effectively.computers uses only binary code i.e. 0 and 1 for processing information. this 0 and 1 can be said as on and off respectively.This is only the language understood by complete to complete an instruction.
   In 1936 in Berlin, Germany it was believed that the first computer was developed.
In 1936, the Z1 was invented by Konrad Zuse in Germany. Z1 is a programmable device that has the capacity of remembering numbers. Now this process is called as memory.
In 1944 IBM introduced the Harvard Mark 1 that was finished at Harvard University. Harvard Mark 1 is a computer that has the capacity of calculating different types of numbers. Hence, it was very large calculator. along with the advancement and high research of the technology many companies such as: IBM, Apple as well as Intel developed PC (Personal Computers) as we are familier with it. 
The Apple 1 was invented in 1976 whose price was allocated to be $700. Its memory with
4kb expandable to 8kb and contains CPU of 1mhz.

Similary, the Apple 2 was released in 1977 whose price was allocated as $1298. It contains CPU of 1mhz and memory is 4kb which is expandable to 48kb.

The Macintosh was released in 1984 whose price was $2000. it contains CPU of 25mhz and has memory 64kb expandable to 256kb.
Moreover, the first mouse was developed in 1964
First IBM 51000 Portable Computer was released in 1975 whose price ranged from $8,975 to $19,975. Its weight is 55lb , contains Cpu of 1mhz and has 16kb memory power.


Likewise, The IBM PC 5150 was released in 1984 whose price was alloted as $1900. It contains CPU of 55mhz and has memory 64kb expandable to 256kb.


Talking to forward, computers initiated with the memory and storage capacity in kilobytes then megabytes and then, gigabytes. The processor's speed started out from megabytes to gigabytes.

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