Computer And It: Hard disk drive

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A video introduction of computer

very useful information in this video.

comment for asking question.

Microprocessor

A microprocessor is a computer processor which incorporates the functions of a computer's central processing unit (CPU) on a single integrated circuit (IC),or at most a few integrated circuits. The microprocessor is a multipurpose, clock driven, register based, programmable electronic device which accepts digital or binary data as input, processes it according to instructions stored in its memory, and provides results as output. Microprocessors contain both combinational logic and sequential digital logic. Microprocessors operate on numbers and symbols represented in the binary numeral system.

The integration of a whole CPU onto a single chip or on a few chips greatly reduced the cost of processing power. Integrated circuit processors are produced in large numbers by highly automated processes resulting in a low per unit cost. Single-chip processors increase reliability as there are many fewer electrical connections to fail. As microprocessor designs get faster, the cost of manufacturing a chip (with smaller components built on a semiconductor chip the same size) generally stays the same.

Main memory

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Main memory

The computer can manipulate only data that is in main memory. Therefore, every program you execute and every file you access must be copied from a storage device into main memory.

Main memory are two types. Types are following.

ROM(Read only memory)
RAM(Random access memory)

1. ROM

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ROM stand for read only memory .ROM is a type of storage medium that permanently stores data on personal computers (PCs) and other electronic devices. It contains the programming needed to start a PC, which is essential for boot-up; it performs major input/output tasks and holds programs or software instructions.

The types of ROM are following.

EROM
EPROM
EEPROM
FLASH EEPROM

2. RAM

RAM stand for random access memory . RAM is the place in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device's processor. RAM is much faster to read from and write to than other kinds of storage in a computer, such as a hard disk drive (HDD), solid-state drive (SSD) or optical drive. Data remains in RAM as long as the computer is running. When the computer is turned off, RAM loses its data. When the computer is turned on again, the OS and other files are once again loaded into RAM, usually from an HDD or SSD .

The types of RAM are following.

STATIC RAM
DYNAMIC RAM

components of computer

A video explanation components of computer

explain easy method.

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Computer basic component

Computer basic components

Computers are made of the following basic components.

Power Supply- The power supply comes with the case, but this component is mentioned separately since there are various types of power supplies. The one you should get depends on the requirements of your system. This will be discussed in more detail later
Motherboard- This is where the core components of your computer reside which are listed below. Also the support cards for video, sound, networking and more are mounted into this board. Microprocessor , Memory
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Hard disk drive- This is where your files are permanently stored on your computer. Also, normally, your operating system is installed here.

CD-ROM drive, Floppy drive
Monitor- This device which operates like a TV set lets the user see how the computer is responding to their commands.
Keyboard- This is where the user enters text commands into the computer.
Mouse- A point and click interface for entering commands which works well in graphical environments.