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PORTS

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Computer - Ports A port is a physical docking point using which an external device can be connected to the computer. It can also be programmatic docking point through which information flows from a program to the computer or over the Internet. Characteristics of Ports A port has the following characteristics − ·          External devices are connected to a computer using cables and ports. ·          Ports are slots on the motherboard into which a cable of external device is plugged in. ·          Examples of external devices attached via ports are the mouse, keyboard, monitor, microphone, speakers, etc. Let us now discuss a few important types of ports − Serial Port ·          Used for external modems and older computer mouse ·          Two versions: 9 pin, 25 pin mo...
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Software

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Computer - Software Software is a set of programs, which is designed to perform a well-defined function. A program is a sequence of instructions written to solve a particular problem. There are two types of software − System Software Application Software System Software The system software is a collection of programs designed to operate, control, and extend the processing capabilities of the computer itself. System software is generally prepared by the computer manufacturers. These software products comprise of programs written in low-level languages, which interact with the hardware at a very basic level. System software serves as the interface between the hardware and the end users. Some examples of system software are Operating System, Compilers, Interpreter, Assemblers, etc. Here is a list of some of the most prominent features of a system software − Close to the system Fast in speed Difficult to design Difficult to understand Less interactive Smaller in ...
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Memory Units

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Computer - Memory Units Memory unit is the amount of data that can be stored in the storage unit. This storage capacity is expressed in terms of Bytes. The following table explains the main memory storage units − S.No. Unit & Description 1 Bit (Binary Digit) A binary digit is logical 0 and 1 representing a passive or an active state of a component in an electric circuit. 2 Nibble A group of 4 bits is called nibble. 3 Byte A group of 8 bits is called byte. A byte is the smallest unit, which can represent a data item or a character. 4 Word A computer word, like a byte, is a group of fixed number of bits processed as a unit, which varies from computer to computer but is fixed for each computer. The length of a computer word is called word-size or word length. It may be as small as 8 bits or may be as long as 96 bits. A computer stores the information in the form of computer words. The following table lists some higher storage units − S.N...
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