1. WHAT IS THE INFORMATION
PROCESSING CYCLE?
The sequence of events in processing information, which
includes
• (1) input
• (2) processing
• (3) output
• (4) storage
3. 1.INPUT
-ENTERING DATA INTO THE
COMPUTER.
Typical input devices:
• Keyboards, mice, flatbed scanners, bar code readers,
joysticks, digital data tablets (for graphic drawing),
electronic cash registers
10. 2.PROCESSING
-PERFORMING OPERATIONS
ON THE DATA.
• CPU Processor - Central Processing Unit
• A central processing unit (CPU), or sometimes simply processor,
is the key component in a digital computer capable of
executing a program. It interprets computer program
instructions and processes data. CPUs provide the fundamental
digital computer trait of programmability, and are one of the
necessary components found in computers of any era, along
with memory and input/output facilities. A CPU that is
manufactured as a single integrated circuit is usually known
as a microprocessor. Beginning in the mid-1970s,
microprocessors of ever-increasing complexity and power
gradually supplanted other designs, and today the term "CPU"
is usually applied to some type of microprocessor.
12. STORAGE
• Storage, also known as mass media or auxiliary
storage, refers to the various media on which a
computer system can store data.
• Storage devices hold programs and data in units
called files.
Hard Drive – storage
13. WHY IS STORAGE NECESSARY?
Storage devices:
Retain data when the computer is turned off
Are cheaper than memory
Play an important role during startup
Are needed for output
15. 3. OUTPUT
• Output devices are peripheral devices that enable us
to view or hear the computer’s processed data.
• Visual output – Text, graphics, and video
• Audio output – Sounds, music, and synthesized speech
18. BY THE END OF THIS UNIT
LEARNERS SHOULD BE ABLE
TO:
• Learners should be able to define and identify the steps
in the information processing cycle
• Identify input, output and storage devices
• Show their own examples of the information processing
cycle using their own life experiences