Categories of Computer

Categories of Computer              Normally, computers are categorized on the basis of size, speed, processing power and price. However, categorizing computers is not very straight-forward. The distinction between these categories is sometimes not very clear. Some characteristics overlap different categories. Computers can be divided into the following categories:1 Personal Computers / Micro Computers             Personal computer is a type of computer that performs input, output, processing and storage activities by itself. It was introduced in 1970. It contains a processor, memory and one or more input, output and storage devices....

Read more »

Generations of Computer

Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:"";...

Read more »

Boot Order Enter BIOS Keys

...

Read more »

History of Computer

History of Computer Computer was invented because “necessity is the mother of invention”. Man always searched for a fast calculating device. It took a long time to invent the digital computer. A brief history behind the invention of computer is as follows: Abacus             Abacus was first computing device. It was developed 5000 years ago. It was used to perform simple addition and subtraction. Abacus was a wooden rack. It contained horizontal wires with beads strung in them. The beads could move easily. All simple arithmetic calculations were performed by moving these beads according to programming rules. Normal 0 false false false ...

Read more »

Characteristics of Computer

Following are the important characteristics of a computer:1.       Speed               Computers work at a very high speed and are much faster than humans. A second is very large time period time for computer. A computer can perform billions of calculations in a second. The time used by a computer to perform an operation is called the processing speed. Computer speed is measured in Mega Hertz (MHz) or Giga Hertz (GHz).  2.       Storage              A computer can store large amounts of data permanently. Users can use this data at any time. We can store any type...

Read more »

Software and Hardware

          Software is a set of instructions that tells a computer what to do. A computer works according to the given instructions in the software.                  The physical parts of a computer are called hardware. The user can see and touch hardware. Keyboard and mouse are examples of hardware.Relationship of Software and Hardware                  Software is a set of instructions that tells computer hardware what to do. The hardware...

Read more »

Definetion of C.P.U.

 Define C.P.U.C.P.U           C.P.U stands for Central Processing Unit.C.P.U is a highly complex set of electrical circuits that executes stored program instructions. It is also known as brain of computer.C.P.U can be divided into two main parts.      Control Unit       Arithmetic and Logical UnitHow many types of computer are there uses?There are following types of computers.1.     Personal Computers (PCs)       Types of PCs ·         Desktop PCs·        ...

Read more »