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Computer Science

Microcomputers

Profile image of Myron HechtMyron Hecht

1984

Abstract

Configurations of Operating Systems 2-8 Common Higher Order Languages Used in Microcomputers 3-1 Job Functions of the User Classifications 43 3-2 Characteristics of User Classes 3-3 Clerical User Characteristics and Desirable Syston Attributes 3-4 Administrative User Characteristics and Desirable System Attributes 3-5 Professional User Characteristics and Desirable System Attributes 3-6 Technical User Characteristics and Desirable Syston Attributes 53 vi Chapter 2-Overview of Microcanputers Othe r Technologies Additional mass storage technologies are constantly emerging. Magnetic bubble momory is useful for mass storage in specialized applications where high reliability or low weight are considerations-Its disadvantages are higher cost and limited capacity. Optical disks may be useful for storing large amounts of permanent data, but the technology is still relatively new, and additional work on the basic technology, hardware interfaces, and syston software is necessary for these devices to becane practical for conmon applications. 2.2.3. Keyboards Keyboards are the most conmon input device for curroit microcomputers and may be either an integral part of the case holding the video display or detached. In addition to the letters, numbers, punctuation, and special symbols typically found on typewriter keyboards, some microcomputer keyboards have special function keys. These keys allow the user to manipulate the display, memory, programs, or peripheral devices. Numeric keypads (i.e. those resembling adding machine keyboards) and cursor control keys (see section 2.2.5) are also found on many microcomputers keyboards, 2.2.4. Other Input Devices Keyboards may be supplonented by other input devices including pointing devices, digital to analog converters, and voice input. Pointing devices enhance operator convenience in such operations as making a choice from a list of options or indicating data to be acted on (e.g. designating a paragraph to be deleted from a document) and for performing graphics operations. Table 2-4 lists pointing devices which are commonly used for microconputers. 144

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  79. TITLE AND SUBTITLE Microcomputers: Introduction to Features and Uses
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  81. PERFORMING ORGANIZATION (If jo/pt or other than NBS, see instructions)
  82. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street. City. State. ZIP) Institute for Computer Sciences and Technology National Bureau of Standards Washington, DC 20234
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