Telnet: History, Purpose, Advantages, Disadvantages

Before gophers, hypertext, and sophisticated web browsers, telnet was the primary means by which computer users connected their machines with other computers around the world. Telnet is a plain ASCII terminal emulation protocol that is still used to access a variety of information sources, most notably libraries and local BBS’s. This report will trace the…

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…

Central & Peripheral Parts of a Computer

Central Parts Motherboard The main circuit board of the computer to which all components are attached. It contains metal tracks through which electricity flows, electronic devices, and transistors that control the flow of electricity. (The motherboard is like a city, with highways and streets that connect the buildings together.) CPU (Central Processing Unit) Also called…

Java Syntax Reference sheet

Comments Documentation Comment Statement Comments /** * */ E.g., /**  This is a sample comment *     that would span *     multiple lines   */ // // This is a sample single line comment Primitive data Type int E.g., int sumOfNumbers; double E.g, double average; char E.g., char singleChar; boolean E.g., boolean isBig; Declaring Variables <Visibility>  <type> …

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…

Computer Software and Types

Software is the programs, routines, and symbolic languages that control the functioning of the hardware and direct its operation. Types of Software Retail Software type of software is sold off the shelves of retail stores. includes expensive marketing and packaging designed to catch the eye of shoppers generally more expensive OEM Original Equipment Manufacturer designed…