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Factors you need to consider before installing or upgrading an operating system or productivity application.

Software installation and upgrades There are some factors you need to consider before installing or upgrading an operating system or productivity application to ensure it will work. You should make sure that the application you wish to install is compatible with your operating system. Hardware technology systems – This is the computer specification, particularly the CPU, video systems, amount of RAM and free disk space. If any of these are not good enough for the new software the installation will fail. Accessibility  features – If these are important to the user they should be checked to ensure they are included in the software before it is installed. Cost of the software – An organization needs to check the full cost of the software before installation. The full cost will be the cost of the licences needed for all the computers plus the cost of setting the software up, training staff and paying for any support and maintenance. Speed – this is important especially when new softw...
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Flow charts explained with diagrams. (terminator/process/decision box/data/connector)

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Flow charts You can use flow chart to help design a program. A flow chart is a diagram that shows how a program works and the routes can be taken through it. A flow chat shows where the program starts and where decisions are taken. Processing operations, inputs, and outputs. Process – Used to represent a calculation or general processing operation carried out by the program. Terminator – Shows where the program starts or finishes. Decision box – used in any place where the program makes a test to decide on a choice of directions to run the next code. Data (input/output) – Represents any part of the program that takes data in or shows prints or outputs data. Connector – aka flow line. These lines connect other parts of the flow chat to show the routes the program can take. Flow lines usually have an arrow at one end to the show the direction the program takes. If there is no arrow the direction will be either downwards or to the right. The components of a flow chart Copyright goes to it...
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The role of operating systems (OS).

Operating systems The role of an operating system is to link the hardware with the user and any program running on the computer. The operating system has many functions like the following: -           Managing files – by copying, renaming, deleting them and using folders. -           Managing hardware – by loading programs, allocating them resources, and using drivers to link specialist hardware such as a video card. -            Allocating resources – by sending keyboard/mouse inputs to programs, as well as accesing other resources such as printing and the hard disk. -           Handling security issues,  such as restore points ((to return system files and settings back to an earlier state), backups and access to files when multiple used share a PC.
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