Three levels of IT technology

Full name: information technology, that is, information technology

It actually has three layers: the first layer is hardware, which mainly refers to hosts and network communication devices for data storage, processing and transmission, and the second layer refers to software, includes various software that can be used to collect, store, search, analyze, apply, and evaluate information. It includes the ERP (Enterprise Resource Plan), CRM (Customer Relationship Management) that we usually refer) and SCM (supply chain management) and other commercial management software, including WF (workflow) management software used to enhance process management, DW/DM for Auxiliary Analysis (data warehouse and data mining) software, etc.; Layer 3 refers to the application, which refers to the collection, storage, retrieval, analysis, application, evaluation and use of various information, including the application of ERP, CRM, SCM and other software for direct decision-making, it also includes using other decision analysis models or technical means such as DW/DM to further improve the quality of analysis and assist decision makers in making decisions (to emphasize one point, it is only to assist rather than substitute for decision-making ). Some people understand that it combines the first and second layers into one, which refers to the storage, processing and transmission of information, and the latter is the application of information. Some also combine the second layer into one, it is divided into hard front and soft back. Generally, the third layer has not received enough attention, but in fact, only when the information is effectively applied can the value of it be fully realized, and the goal of Informatization be truly achieved. Informatization itself is not a goal. It is only a good way to achieve the goal in the current era.

It is short for information technology, which refers to information-related technologies. Different people and different books have different interpretations of this. However, most people agree that it consists of the following three parts:

----- Sensing technology is an extension and extension of human sensory organs. The most obvious example is bar code reader;
----- Communication technology is an extension and expansion of the human nervous system and is responsible for the function of transmitting information;
----- Computer technology is an extension and extension of the human brain function, and is responsible for processing information.