Information Technology Revision Notes

REPETITIVE STRESS INJURY    prevented by     - using wrist supports            - using ergonomically designed devices &n click here for full revision note

EMPLOYMENT    New jobs have been created        - programmers        - web page designers       &nbs click here for full revision note

 WHAT IS A FEASIBILITY STUDY?A feasibility study is the first stage in the systems life cycle. It helps businesses decide if converting from a manual to an information technology method is going click here for full revision note

REAL TIME PROCESSINGReal-time uses on-line systems which are directly connected to a computer and under its control.    The computer is always ready for data to be input.   &n click here for full revision note

The Purpose of Operating System software is to :    1. Control Hardware ( devices ) e.g. Mouse & printer drivers   2. Provide a "graphical user interface" between the click here for full revision note

- high level programming languages are used to program - visual basic - making windows programs = object orientated language - HTML - hyper text mark-up language = the language of the click here for full revision note

THE DATA PROTECTION ACTThis Law covers the storage of personal data about members of the public on a computer system.What is personal data? Information about yourself that you don't want other people click here for full revision note

TYPES OF SOFTWAREGeneric software        - Word Processor        - SpreadsheetApplication software        - Li click here for full revision note

What is the Internet? A network of computer networks that enables information to be exchanged and shared. How do I connect my PC to the Internet?    1. Purchase a modem to connect your PC to click here for full revision note

LOCAL AREA NETWORKS ( LAN )Computers are connected together on one site using a cable such as ethernet The File server stores all programs and data. Relative Advantages of a LAN compared to stand alon click here for full revision note