The document discusses different types of computers based on their functionality and size. It describes analog computers as using continuous variables for mathematical operations, digital computers as using binary digits, and hybrid computers as combining both analog and digital components. It then classifies computers as mainframes for large organizations, minicomputers for small corporations, servers that provide network services, supercomputers with powerful processing, and microcomputers including personal computers, laptops, workstations, and personal digital assistants.

1. Types of
Computer
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• It uses continuous variables for mathematical operations utilizes mechanical
or electrical energy
Analog Computer
• Use digital circuits and are designed to operate on two states, namely bits 0
and 1
Digital Computer
• Both analog and digital
• The digital segments perform process control by conversion of analog
signals to digital ones
Hybrid Computer

2. Classification of
Computers
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Based on their sizes and
functionalities

3. Based on their sizes and functionalities
Mainframe
Computer
-use by large
organizations for
highly critical
applications such as
bulk data
processing
-handle gigantic
processing jobs for
large corporations
or agencies
Minicomputers
-also called mid-
range or systems or
workstations
(third generation
computers)
-handle the
computing for small
corporations
Servers
-provide services to
client machines in a
computer network
are not designed for
individuals. They
make programs
available for
network users
Supercomputers
-it has well-designed
memory hierarchy
that gives large
transaction processing
powers
Microcomputers
-It has microprocessor
and CPU
Also called personal
computers

4. Personal Computers
Desktop – PC, iMac
Notebook – Laptop
Workstation
Personal Digital
Assistant