Excuse me, who has participated in the rural compulsory teacher recruitment examination in Hubei Province in recent years-primary school information technology?

Overview of basic knowledge points of information technology

Chapter I Information and Information Technology

I information and its characteristics: information is everywhere 1. Material, energy and information are the three major elements of human society. 2. Information refers to the meaning contained in data, signals and messages. 3. Information is the motion state of things, and it is a description of the motion state of things. Everything in the world is constantly moving and changing, and everything has information. 5. Information refers to what the message receiver doesn't know in advance, so it is "uncertain".

Second, the carrier and form of information: 1. Information itself is not an entity, it can only be embodied by the carrier, but it does not change with the physical form of the carrier. 2. Language, characters, sounds, images and videos are the carriers of information, and they are also common manifestations of information. 3. Paper can carry characters and images, magnetic tape can carry sounds, and TV can carry languages, characters, sounds, images and videos. Therefore, paper, tapes, radios, televisions, compact discs, etc. are also called information carriers. 4. The same information can be expressed and spread through many different carriers. 5. Without carrier, there is no information.