History Of Databases: Condor 3, dBaseIII, and Omnifile

In the 1960’s, the use of main frame computers became widespread in many companies.  To access vast amounts of stored information, these companies started to use computer programs like COBOL and FORTRAN.  Data accessibility and data sharing soon became an important feature because of the large amount of information recquired by different departments within certain…

ASCII: American Standard Code for Information Interchange

Recall: Computers communicate using binary Therefore, computers do NOT process information using characters (e.g. letters). Each letter or character has a number representation that the computer uses to refer to the character. ASCII: American Standard Code for Information Interchange ASCII is a code for representing English characters as numbers. The ASCII numbers range from 0…

Computer Communication Channels and Cables

Definition In a network, a communication channel is the physical path the transmission signals travel. It is the path information travels from computer to computer. How do the computers in a network “connect” to each other. The 5 communication channels twisted pair cables coaxial cables fibre optic cables terrestrial stations communication satellites Twisted pair cables…

Types of Computers & Parts

Hardware vs. Software Hardware is the physical equipment directly involved in the performance of data-processing or communications functions. Software is the programs, routines, and symbolic languages that control the functioning of the hardware and direct its operation. Definition of a computer A computer is a programmable machine that stores, retrieves, and processes information A Personal…