IPTHSCSummarydoc.docVIP

IPT HSC Summaries Pg.  PAGE 38 The Illawarra Grammar School HSC Information Processes Technology Summary Sheets   Concept: Information Process - Collecting Definition: involves deciding what to collect, locating it collecting it. Summary Points: data formats may be numbers, images, text, forms audio, video input devices: pointing devices, scanners keyboard digital still cameras / video cameras, microphones, optical recognition devices (OCR). operating system is used to interface with the hard ware collection device the user Example: Flatbed scanner may be used to digitise an image. The operating system connects to the scanner.Concept: Information Process - Organising Definition: involves the modification of data by arranging, representing formatting data. Summary Points: digitising is the process of translating data into binary digits that can be stored used by a computer. each type of data must be represented digitally text: ASCII; images: bit-map (jpg, gif) audio: sampling application software organises data. Paint / draw, multimedia, word processing, desktop publishing, spreadsheet, database, slide shows. Example: Powerpoint may use text, images, video audio. Each datatype is processed differently. Concept: Information Process - Analysing Definition: involves the interpretation of data, transforming it into information. Summary Points: information is processed raw data, it has been ordered and given meaning to people. searching, sorting, modelling (simulations) ‘what if’ predictions, charts allows analysing Example: Counting the total number of students who do Biology in Year 12, sorting in alphabetical order Concept: Information Process – Storing / Retrieving Definition: involves saving data information for use (storing) and obtaining data and information that has been previously saved (retrieving) Summary Points: writing and reading data to hard disk direct access: access to data like a CD sequential access: access to data