1. Keyword searching has been the dominant approach to text retrieval since the early 1960s; hypertext has so far been confined largely personal or corporate information-retrieval applications.
2. Databases are structured to facilitate storage, retrieval, modification, and deletion of data in conjunction various data-processing operations.
3. Through a process called time-sharing, a large computer can handle interaction with hundreds of users simultaneously, giving each the perception of the sole user.
4. Systems engineering is the technique of using knowledge from various branches of engineering and science to introduce technological innovations into the and development stages of a system.
5. Computer simulations are used to study the behaviour of objects or systems that cannot be easily or safely tested in real life, such weather patterns or a nuclear blast.
6. Fibreoptic technology has virtually replaced copper wire in long-distance telephone lines and is used to link computers in local area networks, with digitized light pulses replacing the electric formerly used for the signal.
7. The four fundamental arithmetic operations (addition, subtraction, multiplication, and division) can all be reduced to combinations of fundamental Boolean algebraic operations on numbers.
8. Most digital computer systems have two types of memory, the main memory and one or auxiliary storage units.
9. Digital computers use a modem to transform outgoing digital electronic data; a similar system at the receiving end translates the signal back to the original electronic data.
10. The simplest data structure is the one-dimensional (linear) array, in which stored elements are numbered with consecutive integers and contents are by these numbers.