Prepared by:VICOR P. BRABANTE

BEED 2-IRR

COMPUTER

COMPUTER

An electronic, programmable, multiuse machine that accepts, processes, stores data and sends output as a useful result.

A device capable of performing a series of arithmetic or logical operations.

A computer is distinguished from a calculating machine, such as an electronic calculator or calculating machine, device for performing numerical computations; it may be mechanical, electromechanical, or electronic. The electronic computer is also a calculator but performs other functions as well and by being able to store a computer program.

4 basic functions

Input Accepts data, through input devices like

keyboard, mouse, scanner and the like. Process Manipulate input OutputProduces output, through monitor, printer and

the like. Stores keep data for future needs

3 MAIN ELEMENTS OF COMPUTER SYSTEM

Hardware, physical components of computer that you can actually touch such as keyboard, monitor, system unit, mouse, printer and the like.

Software, sets of instructions use to direct the hardware on how to run data into useful information for people use. These are programs used by the user to interact with the computer.

People ware, they are most important factor in a computer. The y manipulate and program the computer system to make it useful.

CLASSIFICATION OF

COMPUTER ACCORDING

TO DATA HANDLED

1. ANALOG COMPUTER The name analog came from the

word analogous meaning similar. These are computers used for scientific, engineering and process-control purposes. It deals with quantities that continuously variable, they give only approximate result.

2. DIGITAL COMPUTER Is the machine specializes in

counting. These machines are used for both business an scientific purposes.

3. HYBRID COMPUTER These are computers that combine

the measuring the capabilities of the analog and control capabilities of the digital computer.

Classification of computers according to

capacity

CAPACITY The term refers to the volume of work of

the data processing capability computer.

Computer performance is judged by the following:

1. Amount of data that can be stored in memory.

2. Speed of internal operation of the computer.

3. Number and types of peripheral devices.

4. Amount and type of software available for the computer.

MICROCOMPUTERS

Also known as the personal computer (PC).these are typically found in homes and small offices, business and etc.

It includes the Laptop, Notebook, Personal Digital Assistant (PDA)

MINICOMPUTERS

These computer small but powerful than a microcomputer.

It can carry out the processing tasks for several people working and terminals that are connected to the minicomputer.

Terminal- is an input and output device that resembles a microcomputer because it has keyboard and screen but does not have processing capacity.

MAINFRAME

It is large, fast and fairy expensive computer.

Generally used by business or government to provide centralized storage, processing and management for large amount of data.

They are actually the bigger version of minicomputers such that handles more amount of data and bigger number of users.

SUPERCOMPUTERS

The fastest and most expensive type of computer designed for “ computer-intensive” tasks such as molecular modeling, code breaking and weather prediction.

It can process more than one trillion instructions per second. Making it possible to perform complex tasks such as modeling the movement of thousands of particle sin tornado or creating realistic animations.

COMPUTER CAPABILITIES

Ability to perform certain logic operations.

Ability to provide new time dimensions.

Ability to control error.

Ability to check itself.

COMPUTER LIMITATION

Dependence on prepared instructions.

Inability to provide meaning from objects.

Inability to generate information.

It cannot correct wrong instructions.

Why computer sometimes fail?

Input errors. Errors in instructing a computer. Communication gap. Improper controls. Lack of standards. Lack of adequate manufacture

support.