代写CS1102 Introduction to Computer Studies Lecture 06调试数据库编程

日期：2025-11-06 05:20

Department of Computer Science

CS1102 Introduction to Computer Studies

Lecture 06

Computer System Hardware

Semester A, 2025-2026

Computer System

Computers are electronic devices that can follow instructions to accept input, process data, and produce information

Input

Input is any data or instructions entered into a computer

Input devices are hardware used to translate words, numbers, sounds, images, and gestures that people understand into a form. that the system unit can process

Keyboard

A keyboard converts numbers, letters, and special characters that people understand into electric signals

Keyboard Categories (1)

Traditional keyboards

• Full-size keyboards widely used on desktops and computers

• Standard US traditional keyboard has 101 keys including function keys, navigation keys, and a numeric pad

• Toggle keys such as Caps Lock key turn a feature on or off

• Combination keys such as Ctrl key perform. an action when held down in combination with another key

Keyboard Categories (2)

Laptop keyboards

• Attached to the laptop system unit and designed to fold up with laptop monitor

• High-end tablets may include a laptop keyboard that can be removed from the tablet or double as a protective case

• Come in a variety of configurations, depending on manufacturer and the size of the laptop

Differences between desktop keyboard vs. laptop keyboard

• Size

• Function keys

• Layout

• Connectivity

Keyboard Categories (3)

Virtual keyboards

• Primarily with cell phones and tablets

• Do not have physical keys that are present in other keyboards

• Keys are displayed on a screen and selected by touching their image on the screen

Differences between virtual vs. physical keyboard

• Form. (software vs. hardware)

• Tactile feedback

• Flexibility for customization