1.2.2 Application generation - Harvey

Used by the end user to perform one specific task

desktop publishing, word processing, spreadsheets

Low level software responsible for managing computer resources

library programs, utility programs, operating system

Used to maintain consistent high performance of the operating system.

Compression Defragmentation Antivirus

Rearranging the contents of the hard drive so they can be accessed faster.

To detect potential threats to the computer.

compress large files for transmission across internet.

Code written by a programmer

Low level code understood by the computer

Can access it without a license comes with source code

Needs license to use it so can’t access source code.

Can be modified to make improvements by anyone Access to support from community.

Proper tested updates Expert support from developers Higher level of security

Insufficient/incorrect support online Lower security

Users cannot make improvements Longer time to fix bugs/errors

Program that converts high level source code into low level object code

Compiler Interpreter Assembler

Translate high level code into machine code all at once

Translates and executes code line by line

Translates assembly code into machine code

They stop and produce an error if a line contains an error. Code can be executed on a range of platforms.

Slower than running compiled code Requires an interpreter in order to run code.