1. Types of Computers

2. Hardware Classifications  Microcomputers  Minicomputers  Mainframe Computers  Supercomputers

3. Microcomputer  The kind of computer that you and I own.  First computers whose CPU was on a single chip.  Many configurations:  PC (personal computer)  Desktop  Notebook or laptop  Tablet computer  Tablet  Sub-notebook  Personal Digital Assistant (PDA)  Smartphone

4. Mainframe Computers  Typically large systems with large amounts of storage  Normally kept in rooms with special air conditioning  Designed to process large amounts of data.  Typically used by multiple users.  They require specially trained individuals to run them called computer operators.

5. Minicomputer  Typically the size of a file cabinet or small desk.  Multiuser systems.  Usually run by computer operators

6. Supercomputers  Typically contain very powerful processors and large amounts of memory.  Perform complex numerical computations to solve scientific and military problems

7. Functional Classifications  Server  Workstation  Embedded computer systems  Portable Data Entry Terminals

8. Servers  Primary task of storing and retrieving large quantities of data often of a specific type.  Database server  Web server  Mail server  File server

9. Workstation  The term has two meanings.  Sometimes used to mean standard desktop PC used by a worker in an office.  The term workstation technically refers to computers that run a variant of UNIX and are designed to be used by only one person. They typically contain high performance hardware. Often used in medical research, digital imaging and engineering.  Even though macintosh computers might technically satisfy these conditions, they are not usually workstations.

10. Embedded computer systems  General CPUs that run only one program  Typically found in automobiles, microwave ovens, DVD players, etc.  Probably accounts for at least 90% of all CPUs in use today.

11. Portable Data Entry Terminals  Handheld devices used to record data