“Introduction to Computer Science”;“Introduction to Computer Science”;Contents;Chapter 1 Computers and digital basics ;Section A all things digital;A computer network is a group of computers linked by wired or wireless technology to share data and resources.

The Internet is a global computer network

The Web (short for World Wide Web) is a collection of linked documents, graphics, and sounds that can be accessed over the Internet.;CONVERGENCEWhat is convergence? (P.8 of E)How does convergence affect the typical consumer?Quality;What is a computer? (Von Neumann’s definition);A computer accepts input ;A computer produce output ;A computer processes data ;A computer stores data ;computer program ---The series of instructions that tells computer how to carry out processing tasks.

Software-- programs; The Evolution of Computer ; The Evolution of Computer ;;;代次;Chinese “神威” computer;The Functions of Computer;The Category of Computer;Personal computerMicroprocessor-based computing device for an individual

Workstation: Two meanings– 1. an ordinary personal computer connected to a network – 2. powerful desktop computers for high-performance tasks (such as CAD);2. Server Serve computers on a network supplying data

Client: requests data from a server is referred to as a client ;3. Mainframe

Large, fast, expensive;Business, government;Provide centralized storage, processing and management for large amount of data;simultaneously handle thousands of users.

;4. Supercomputer

---- the fastest computers in the world

Fastest, most expensive;Designed for “computer-intensive” task, such as molecular calculations, atmospheric modeling or simulating nuclear explosions;計算機的分類;Data representation basic:what is data?data refers to the symbols that represent people, events, things, and ideas. data can be a name, a number,

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