Chap. 1 : Unit 1: Introduction to Computers: Part 3

संगणक वापरण्यासाठी user अथवा प्रणाली लिहीण्याकरीता प्रथम संगणकाचा Block Diagram शिकला तर C language शिकतांना आपल्याला अधिक सोयीचे ठरणार आहे. म्हणुन आपण आपण संगणकाचा block diagram ची संक्षिप्त स्वरुपात माहीती करुन घेऊ. Block diagram संगणकाचा logical flow diagram असेही म्हणता येइल बर का…

For end user as well as a programmer, knowing the block diagram of the computer is very important for learning any computer programming language so here we would try to explore all components of a block diagram…..

Block diagram is also called as logical flow diagram….

What you see at extreme left is input unit, basically as I told you before keyboard, mouse, scanner, webcam, and mike are a few examples of input through which we can input to the computer.

The next one, at the center is called as processor which primarily processes the data received from the input devices and so it’s called as processing unit.

This is handled by processor called Central Processing unit or in a short CPU.

Artistically sometimes it is also called as brain of the computer!

Intel, AMD means Advanced Micro Devices are processor designer companies…..

Once the data and instructions are processed by the processor, it is sent to monitor which usually acts as an output device. It is also sent to the storage device for storing the information. Monitor is display device and just shows the information retrieved from the temporary storage i.e. RAM. Printer, speaker, projector are also various output devices…

Data from the input device, data to be processed, and information to be sent to the output device like monitor or printer, computer needs some kind of storage media for intermittent storage of data or information…

Now tell me which are the storage devices….?

Hard disk, RAM, Magnetic tape, CD, pen drive are types of storage devices.

As seen just before knowledge of storage is necessary for understanding concepts of C language which is habitually overlooked or ignored by new learner and jump directly for writing programs We will try to devote some time exclusively for storage

Storage is basically divided into 2 categories

One is Primary Storage and other is Secondary Storage

Primary is a volatile memory and so temporary in nature exception is read only memory…on the contrary… secondary storage which we just studied is permanent in nature

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