Published on April 8, 2008
3: 3 Computer Hardware Chapter Objectives: Identify the major types, trends, and uses of microcomputer, midrange, and mainframe computer systems. Outline the major technologies and uses of computer peripherals for input, output, and storage. Identify and give examples of the components and functions of a computer system. Identify the computer systems and peripherals you would acquire or recommend for a business of your choice, and explain the reasons for your selections. Chapter Objectives Computer System Categories: Computer System Categories Trends in Computer System Capabilities: Trends in Computer System Capabilities Microcomputer Systems: Microcomputer Systems Handheld Computers PDA, Information Appliances Notebook Computers Desktop Computers Workstations Network Server Powerful microcomputer used in small LANs Network Computers and Terminals: Network Computers and Terminals Network Computer (Thin Client) NetPC Network Terminal Benefits Lower purchase cost Easier maintenance Easier software distribution and licensing Computer platform standardization Reduced end user support requirements Improved manageability Computer System Components: Computer System Components Input Technology Trends: Input Technology Trends Common Input Devices: Common Input Devices Keyboard Pointing Devices Pen Based Computing Speech Recognition Optical Scanning Magnetic Ink Character Recognition Smart Cards Digital Cameras Output Technology Trends: Output Technology Trends Common Output Devices: Common Output Devices Video Output CRT LCD Printed Output Inkjet Laser Storage Trends: Storage Trends Primary & Secondary Storage Media: Primary & Secondary Storage Media Characteristics of Magnetic Disks: Characteristics of Magnetic Disks Chapter Summary: Chapter Summary A computer system is a system of information processing components that perform input, processing, output, storage and control functions. The hardware components in a computer include input and output devices, a central processing unit (CPU), and primary and secondary storage. There are three major categories of computers: microcomputers, midrange computers and mainframe computers Chapter Summary (cont): Chapter Summary (cont) Microcomputers are used as personal computers, but are also interconnected in a variety of telecommunications networks. Midrange computers are increasingly being used as powerful network servers and for many multi-user business data processing and scientific applications. Mainframe computers are larger and more powerful and are used to handle information processing needs for large organizations . Chapter Summary (cont): Chapter Summary (cont) Peripheral devices used for input and output come in a variety shape and sizes. Future trends are towards devices that communicate naturally and are quick and easier to use.