Programming language based around solvingproblems using constraints given to the program,rather than using an algorithm written by aprogrammer.

Fourth generationlanguages are usedto help eliminatemany of the strictpuncuation andgrammar rules whichcan complicate thethird generationlanguages. They arealso high levellanguages.

High level languagesthat came about in the1950's. Mostly used forbusiness and scientificapplications, and wereconsidered majorimprovements from thefirst two generationlanguages.

Known as assemblylanguages, classified asa low level languagebecause it is machinespecific and eachassembly commandcorrasponds on a 1 to1 basis to a machinelanguage instruction.

Refered to as machinelanguages. Consists of aset of commands, whichare represented as aseries of 1s and 0scorresponding to theinstruction set that ishard wired into thesecurity of amicroprocessor.