This document provides an overview of different types of computer software, including systems software, applications software, programming languages, and specific productivity applications. It discusses operating systems, document production software, graphics packages, spreadsheets, databases, and how these software applications are used to increase productivity in business organizations. Key terms related to databases like fields, records, tables, and structured query language are also defined.

1. Chapter 4 Software

4. Figure 4.1 Categories of computer software

7. Figure 4.2 Diagram showing the relationships between the different types of software and hardware

13. Categories of Programming Languages Machine Languages Use binary coded instructions 1001 1001 1100 1101 High Level Languages Use brief statements Compute X = Y + Z Markup Languages Use embedded control codes Assembler Languages Use symbolic coded instructions LOD Y ADD Z Fourth Generation Languages Use natural statements Object-Oriented Languages Define objects that contain data and actions Document.write (“Hi There”) <H1>First heading</H> <!ELEMENT Product (#Item | manuf)> SUM THE FOLLOWING NUMBERS

19. Programming Languages (Cont.)

38. Figure 4.4 Organisation of a spreadsheet worksheet showing example formula

41. Databases : key terms : entry Field: e.g. PO number, Date Each PO is a RECORD Collection of all POs is a Table PO Table Supplier Table Customer Table Order Table In this example each drawer is a table!

48. Figure 4.6 An example of how key fields are used to link information from different database tables

51. Databases : key terms : entry Name: Chaffey Address: 32 Cricket Street Oxford Postcode: OX5 6DG Tel: 01865 234 678 Manual record card system Field names Records Together equivalent to database table Screen form for Record entry Name Address1 Address2 Postcode Tel