The major component of computer system is CPU, Input Unit and Output Unit. All the performances of computer revolve around these components. The output unit is used to present soft and hardcopy of information.
The VDU (Visual Display Unit or Monitor) and printer are common output units. There are many categories of display units available for computer. The LED (Light Emitting Diode), LCD (Liquid C
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Extension slots expand the capabilities of computer. These are slots that allow new and enhanced feature to be added by you.
Expansion slots can be categorized into three different categories: ISA, PCI, and AGP.
(i) ISA (International Standard Architecture): are the old slowpoke (16 bits) connectors. They have very low data transfer speeds and interrupt the processor frequently while transf
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A computer consists of an I/O system. This system includes two basic components, one is I/ O device and other called I/O Module. A device which is connected to an I/O module of computer is called a peripheral.
The data entry station or devices are termed as input units. Example: keyboard, mouse, scanner, joystick, joypad, graphics table, MICR etc.
(a) Keyboard:
The keyboard is a standard in
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Amine
Amines are organic compounds that contain nitrogen and are basic. The general form of an amine is shown in Lewis form. R represents an alkyl group, but either or both of the hydrogens may be replaced by other groups and still retain its class as an amine.The fact that amines tend to have foul odors is emphasized by the names of two amines: cadaverine and putresine.
Amines are alkyl or aryl d
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Cyanide
A cyanide is a chemical compound that contains the cyano group, , which consists of a carbon atom triple-bonded to a nitrogen atom. Cyanides most commonly refer to salts of the anion CN?. Most cyanides are highly toxic.
Organic compounds containing (cyanide) are named by three systems.
(a) Cyanide system: In this system they are named as if they are the salts of hydrogen cyan
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The term of PC Installation is very rich in itself. The knowledge of hardware and software, both required, for PC Installation. Now a day, mother board is integrated with sound cards, visual cards and much other hardware required for smooth operation of computer.
Interested student should join hardware courses in their vicinity to avoid wastage of time. It is a totally practical based technology.
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Acid Chlorides
Acid chlorides is a compound containing the radical COCl. The common as well as IUPAC names of acid chlorides are obtained by replacing the final -ic acid of the corresponding acid by -yl chloride, e.g.,
1. Common name: Formyl chloride
IUPAC name: Methanoyl chloride
Formula: HCOCl
2. Common name: Acetyl chloride
IUPAC name: Ethanoyl chloride
Formula:
3.
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The BIOS (Basic Input Output System) can be defined as a set of built in software routines. The BIOS controls many of the most important function of the PC, like how it interprets keystrokes, communication through the computer ports etc. it also has the job of testing the computer every time it is turned on.
In fact it is responsible for the allocation of system resources. Simply stated the BIOS s
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By definition, an interface is anything that allows two dissimilar systems to work together or communicate. In peripherals such as hard disk an interface is required to provide communication between the computer bus and the hard disk.
The most popular interface used in modern hard disks is the IDE (Integrated Drive Electronics) interface, also known as ATA. Another commonly used interface is the S
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Amide
Amide are derived from carboxylic acids. A carboxylic acid contains the -COOH group, and in an amide the -OH part of that group is replaced by an - group.In organic chemistry, an amide is an organic compound that contains the functional group consisting of a carbonyl group (R-C=O) linked to a nitrogen atom (N). The term refers both to a class of compounds and a functional group within those
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