Study Computer Science notes on Computer Applications for O-Level. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the ZIMSEC O-Level Computer Science notes from 2013. It is a free notes for revision.
'O' Level Computer Studies Notes - ZIMSEC Syllabus 7014 COMPUTER APPLICATIONS This chapter deals with the areas where computers are used, what they used for, how they are used, the advantages and disadvantages of their usage in such areas. Computer Aided Design (CAD). This is whereby computers are used in the designing and development of new products in a variety of applications both at home and on a commercial/industrial basis. Models of infrastructure like bridges are designed and tested for their strength before building actual structures on the ground. A model is a computer representation of a real object/process, often involving some formula that determines its behaviour, e.g. a bridge, house, etc. CAD is used in fields like: - Aerospace - Architecture - Car/vehicle design - Construction (e.g. Roads, services, surveying, tunnels, bridges, etc.) - Consumer goods (e.g. kettles, toasters, etc.) - Digital circuits - Factory layouts (e.g. Ergonomics) - Fashion design - Heating systems - Interior designs (houses, offices, etc.) - Lighting systems (e.g. to get lighting effects at a concert) - Machinery design - Plant design (chemical, nuclear, etc.) - Ship building engineering, architectural design, etc. CAD Requirements - considerable processor power - Input devices like: - Light pens - Tracker balls, - mouse - graphics tablets - Output Devices like: - Large high resolution screens - Plotters to draw scale and full size drawings - High specification graphics cards - Some systems support stereoscopic drawings where 3-D spectacles can be worn and the user sees a 3-D image. Features of the CAD software which are used in design are: - Can zoom, rotate, scale, and crop images - Has a library of geometrical shapes that will be used in drawings - Has inbuilt library of components and templates. Kapondeni T. Page 1 of 71 13-Oct-2013