7. Figure 4.2 Diagram showing the relationships between the different types of software and hardware
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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
38. Figure 4.4 Organisation of a spreadsheet worksheet showing example formula
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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!
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48. Figure 4.6 An example of how key fields are used to link information from different database tables
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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
![TOPICS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)