The document defines a computer as an electronic device that processes data, highlighting its characteristics such as speed, accuracy, and storage capability. It classifies computers into categories including supercomputers, mainframes, minicomputers, workstations, and personal computers, detailing their specifications and intended uses. It also outlines the electronic data processing steps: input, processing, output, and storage, and identifies the roles of hardware and qualified personnel in information systems.

1. Melvin D. Punzalan
Subject teacher
BASIC TOOLS AND
EQUIPMENT WITH
OCCUPATIONAL HEALTH
AND SAFETY

2. What is Computer??
- Refers to an electronic
device that accept data
and instruction, Perform
logical and mathematical
operations and generates
the output of the
processing. The output or
result are the information
that we need.

3. Characteristics and Capabilities
• Speed – can work very fast. Computer can perform millions of
instruction and even more per second.
• Accuracy – the degree of accuracy of computer is very high and
every calculation is performed with the same accuracy.
• Versatility - the capacity to perform completely different types of
work.
• Diligence – can work for hours without creating any error.
• Power of Remembering – computer has the power of storing any
amount of information or data.
• No IQ ( Intelligence Quotient ) – Computer is a dumb machine and
it cannot do any work without instruction from the users.
• No Feelings – Computer does not get tired even after a long hours
of work.
• Storage – Computer has an in-built memory where it can store a
large amount of data.

4. Classification of Computers
• Supercomputer
are very expensive, very fast, and most powerful computer in
the world
• Mainframe
are powerful multi-user that capable of supporting many
hundred or thousand of user simultaneously, must in use in
government and large organizations for bulk data processing.
• Minicomputer
are mid-sized multi-user computer that are capable of
supporting 4 to about 200 user simultaneously.

5. Cont..
• Workstation
are single user but powerful computers. Supports
application that require moderate amount of computing
power and high quality graphics capabilities.
• Personal Computer
are also called minicomputer because of
microprocessors for processing data and instruction codes.
Single user computer that have a keyboard for entering data,
monitor, and storage device

6. Electronic Data Processing
• Input – data items enter the computer system and are
placed in memory, where they can be processed.
• Processing – involve organizing or sorting of data items,
checking them accuracy, performing calculating w/ them.
• Output – after data have been processed, the resulting
information usually sent to a printer, monitor, or some output
device so people can view, interpret, and use the results.
• Storage – is the area that contain the processed data and
the instruction that must be followed during data
processing.

7. Component Of Electronic Data Processing
3 Categories of Hardware
 Input Devices
Output Devices
Storage Devices
People
- Qualified people are the vital
component of information System
Hardware
- tangible parts of the computer.