subtraction, addition, multiplication, division, real numbers (floating point), strings, arrays. Applications software: Introduction, software packages, selection of software (factors to consider), wordprocessors (e.g. Wordstar), spreadsheets (e.g. Lotus), report generators (e.g. Harvard Graphics), accounting packages (e.g. Dac Easy). Computer graphics (e.g. CAD packages e.g. Autocad), (to be covered through laboratory exercises). Application Software : Packages: wordprocessing, spreadsheets, database management