Performing Computer Operations

1. Performing Computer Operations

2. Occupational Health and Safety (OHS) • a cross-disciplinary area concerned with protecting the safety, health and welfare of people engaged in work or employment Knowing OHS is essential to minimize the hazards and risks not only to students, trainers and other people within the training institution but others who will be affected.

3. Occupational Health and Safety (OHS) • The goal of all OHS programs is to foster a safe work environment. As a secondary effect, OHS may also protect co-workers, family members, employers, customers, supplies, nearby communities, and other members of the public who are impacted by the workplace environment

4. Occupational health as stated in Wikipedia, aims at: • The promotion and maintenance of the highest degree of physical, mental and social well-being of workers in all occupations; • The prevention among workers of departures from health caused by their working conditions;

5. The protection of workers in their employment from risks resulting from factors adverse to health; • The placing and maintenance of the worker in an occupational environment adapted to his physiological and psychological capabilities; and • The adaptation of work to man and each man to his job.

6. Reasons for occupational safety and standards are: • Moral – and employee should not have to risk injury at work, nor should others associated with the work environment. • Economic – many governments realize that poor occupational safety and health performance results in cost to state • Legal – OHS requirements maybe reinforced in civil law and/or criminal law

7. Objective of the OHS standard • To protect working man against the dangers of injury, sickness or death through safe and healthful working conditions, thereby assuring the conservation of valuable manpower resources and the prevention of loss or damage to lives and properties.

8. COMPUTER is a machine which manipulates data according to a list of instructions which makes it an ideal example of a data processing system.

9. ADVANTAGES • Searching of information • Online businesses and easy transaction • Instant communication • Storage of vast amounts of information • Fast development of technology of all kinds.

10. DISADVANTAGES • Leads exposure of sensitive information to kids • Wastes of time and distraction • Greater complexity of life • Generates a lot of extra work • Some people think we are becoming deskilled

11. CLASSES OF COMPUTERS

12. ANALOG • spelt analogue in British English) is a form of computer that uses continuous physical phenomena such as electrical,mechanical, or hydraulic quantities to model the problem being solved.

13. ANALOG COMPUTER

14. CALCULATOR • is a device for performing mathematical calculations, distinguished from a computer by having a limited problem solving ability and an interface optimized for interactive calculation rather than programming. • DESKTOP • is a personal computer (PC) in a form intended for regular use at a single location, as opposed to a mobile laptop or portable computer

15. DESKTOP REPLACEMENT • is a personal computer that provides the full capabilities of a desktop computer while remaining mobile. EMBEDDED • is a special-purpose computer system designed to perform one or a few dedicated functions, often with real-time computing constraints

16. HOME • was a class of personal computer entering the market in 1977 and becoming common during the 1980s LAPTOP • is a personal computer designed for mobile use that is small enough to sit on one's lap.

17. MAINFRAME • is a computer with a microprocessor as its central processing unit

18. MINICOMPUTER • (colloquially, mini) is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems (mainframe computers) and the smallest single-user systems (microcomputers or personal computers).

19. MICROCOMPUTER • is a computer with a microprocessor as its central processing unit. Another general characteristic of these computers is that they occupy physically small amounts of space when compared to mainframe and minicomputers

20. PERSONAL COMPUTER • is any general-purpose computer whose original sales price, size, and capabilities make it useful for individuals, and which is intended to be operated directly by an end user, with no intervening computer operator.

21. PORTABLE • is a computer that is designed to be moved from one place to another and includes a display and keyboard PDA’s(Personal Digital Assistant) • is a handheld computer, also known as a palmtop computer

22. PLC Programmable Logic Controller • is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, control of amusement rides, or control of lighting fixtures SERVER • computer program that provides services to other computer programs (and their users), in the same or other computer

23. SUPER-COMPUTER • is a computer that is at the frontline of current processing capacity, particularly speed of calculation.

24. TABLET PC • is a laptop or slate-shaped mobile computer, equipped with a touch screen or graphics tablet/screen hybrid technology which allows the user to operate the computer with a stylus or digital pen, or a fingertip, instead of a keyboard or mouse.

25. VIDEO GAME CONSOLE • is an interactive entertainment computer or electronic device that produces a video display signal which can be used with a display device (a television, monitor, etc.) to display a video game.

26. WORKSTATION • is a high-end microcomputer designed for technical or scientific applications. Intended primarily to be used by one person at a time, they are commonly connected to a local area network and run multi-user operating systems

27. PORTABLE DATA ENTRY TERMINALS are handheld devices that are used to record or capture data away from the mainframe computer that they are linked to

28. CLASSIFICATION OF DEVICES • Input Devices • Output Devices • Storage Devices

29. Input Devices • Any devices or peripherals used to provide data and controls signals to an information processing system

30. KEYBOARD -Primary input device of most computer systems -designed to enter text, characters and other commands into the computer.

31. TYPES OF KEYBOARD

32. AT KEYBOARDADVANCE TECHNOLOGY

34. DIN (Deutsche Industrial Normale) - is a series of uniformity standards developed in Germany, which apply to commonly manufactured items.

36. AT KEYPBOARD PORT

37. PS/2 KEYBOARD Personal System/2 or PS/2 is used for connecting some keyboards and mice to a PC compatible computer system.

39. PS 2 CONNECTOR PS 2 PORT

40. USB KEYBOARD

43. INFRARED/ IR KEYBOARD defines physical specifications communications protocol standards for the short-range exchange of data over infrared light

44. is a wireless protocol utilizing short-range communications technology facilitating data transmission over short distances from fixed and/or mobile devices

45. MOUSE pointing device that lets you move the cursor or pointer on the screen easier TECHNOLOGIES: Early Mice

46. World’s first trackball

47. The first mouse

48. Smaky Mouse

49. Latest Mouse: 3 Basic Types • Mechanical Mouse • has a rubber or metal ball on its underside and it can roll in every direction

50. How do it works? • Sensors within the mouse, which are mechanical, detect the direction in which the ball is moving and moves the pointer on the screen in the same direction. A mouse pad should be used under the mouse to run on.