SOURCE DATA AUTOMATION PEN-BASED INPUT: Digitizes signature DIGITAL SCANNER: Translates images characters into digital form VOICE INPUT DEVICES: Converts spoken word into digital form O SENSORS: Devices that collect data from environment for computer input (e. g thermometers, pressure gauges) 2002 by Prentice Hall
SOURCE DATA AUTOMATION PEN-BASED INPUT: Digitizes signature DIGITAL SCANNER: Translates images & characters into digital form VOICE INPUT DEVICES: Converts spoken word into digital form SENSORS: Devices that collect data from environment for computer input (e.g., thermometers, pressure gauges) * © 2002 by Prentice Hall
OUTPUT DEVICES: O CATHODE RAY TUBE (CRT) ◆ PRINTER ◆ PLOTTER ◆ VOICE OUTPUT DEVICE
OUTPUT DEVICES: CATHODE RAY TUBE (CRT) PRINTER PLOTTER VOICE OUTPUT DEVICE *
CATEGORIES OF COMPUTERS ◆ Mainframe Midrange Minicomputer ◆ Server ◆l Personal Computer(PC) ◆ Workstation ◆ Supercomputer
CATEGORIES OF COMPUTERS Mainframe Midrange & Minicomputer Server Personal Computer (PC) Workstation Supercomputer *
Computer hardware trends (1)The CPU ◆ Performance-- 2)Storage devices better 3)User Interfaces ◆ Price-oWer (4)Type of PCs ◆Size-more compact
Computer hardware trends Performance---- better Price----lower Size----more compact (1) The CPU (2) Storage devices (3) User Interfaces (4) Type of PCs
(1) CPU: Evolution of Microprocessors 片 发布时间 时钟速度 8086 78.6 5-10MHZ 80286 82.2 8-12MHZ 80386 85,10 16-33MHz 80486 894 25-50MHz Pentium 93.3 60-166MHz Pentium pro 95.3 150-200MHz Pentium ii 1996 233-300MHz P6 1997 up to 400MHZ Pentium III 99.2 450-1000MHz Pentium iv 2000.11 1500-2GMHz
(1) CPU: Evolution of Microprocessors 芯片 发布时间 时钟速度 8086 78.6 5-10MHz 80286 82.2 8-12MHz 80386 85.10 16-33MHz 80486 89.4 25-50MHz Pentium 93.3 60-166MHz Pentium Pro 95.3 150-200MHz Pentium II 1996 233-300MHz P6 1997 up to 400MHz Pentium III 99.2 450-1000MHz Pentium IV 2000.11 1500-2G MHz