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Development of Computers

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Development of Computers The earliest known device to record computations was the abacus. It dates back to ancient times and was invented by the Chinese. Ten beads were strung onto wires attached to a frame. Addition and subtraction were read from the final positions of the beads. It was considered the first manual tool used in calculating answers to problems that provided information and in a primitive way storing the results. Mechanical Clock During the Middle Ages the first closed system in terms of calculating information was invented by use of a mechanical clock. The parts of the clock calculated the time of day. The time was displayed through the position of two hands on its face. The inventor pre-programmed the clock instructions through the manner in which the pull of the weights and the swing of the pendulum with the movement of the gears established the position of the hands on the clock face.
Mathematics John Napier (Scotsman mid 1600s) discovered logarithms. He devised …

Definition of a computer

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Definition of a computer Lesson Objectives:at the end of this lesson, the learner should be able to describe: definition of a computer parts of a computerperipheral devicesfunctions of a computercharacteristics/features of a computeradvantages of a computerpurpose of a computerbasic terms used in computers
In simple terms a computer is a machine that processes data into information

A computer can also be described as an electronic device that saves, transmits and processes data into information using electrical signals.
The physical parts of a computer include:

Mouse, Keyboard, system unit and screen.
Which part of a computer is missing in the image above? Common terminologies used in computer




Data data simply refers to raw alphanumeric values which have no much meaning to the user.
//raw here stands for unprocessed Information information is a sequence of numbers and characters which can be interpreted as having meaning. Information can also be described as processed data
A computer Progra…

Basic Computer Practices and Maintenance Skills for Starters –Part two

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Basic Computer Practices and Maintenance Skills for Starters –Part two

Adjusting system volume
To adjust the volume for multimedia playback devices
Open Sounds and Audio Devices in Control Panel. On the Audio tab, under Sound playback, click Volume. In the Master Out dialog box, drag the Volume slider for the appropriate device up or down to increase or decrease the output volume.
Installing drivers
A device driver or software driver is a computer program allowing higher-level computer programs to interact with a hardware device. A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware connects. When a calling program invokes a routine in the driver, the driver issues commands to the device, once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware-dependent and operating-system-specific.
Installing a new device
To install a new device, …