Unit 3

Use of technology

·       Ethical – right or wrong by society

·       Legal – right or wrong in the eyes of the law

·       Cultural – groups of people be affected –> beliefs, practices or languages

·       Environmental – impact on natural world

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Copyright design and patents act 1988

·       It’s illegal to:

o   Copy,

o   Modify,

o   Or distribute software, music, video or other intellectual property without permission of the author.

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Computer misuse act 1990

·       It’s illegal to;

o   Make any unauthorised access to data; with the intent to commit further offences; with the intent to modify data, e.g. viruses.

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Data Protection Regulation your rights

·       Right to access data

·       Right to have data corrected

·       Right to data erasure (to be forgotten)

·       Right to restrict processing

·       Right not to be used for marketing

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Freedom of Information Act 2000

·       Members of the public can request information from public bodies about their activities.

·       Public authorities are obliged to publish data about their activities when asked.

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Data Protection Act 1998 replaced by General Data

·       Data should be:

o   Processed for the purpose clearly stated.

o   Relevant and not excessive.

o   Accurate and up-to-date.

o   Kept only for as long as necessary.

o   Secure.

o   Held in countries only agreed by the ICO

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Creative commons licensing

·       A way to grant copyright permissions to creative work

·       It allows an author to retain copyright while allowing others to copy, distribute, and make some uses of their work.

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Open source software

·       Users can modify and distribute the software.

·       Can be installed on any number of computers.

·       Support provided by the community.

·       Users have access to the source code.

·       May not be fully tested.

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Open source software

·       Users can modify and distribute the software.

·       Can be installed on any number of computers.

·       Support provided by the community.

·       Users have access to the source code.

·       May not be fully tested.

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Proprietary software

·       Users can not modify the software.

·       Copyright protected.

·       Usually paid for.

·       Licensed per user or per computer.

·       Support provided by developers.

·       Users do not have access to the source code.

·       Fully tested and supported by developers.

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Driver

·       Translates commands from the operating system into specific commands that a device understands

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Defragmentation

·       Different sized files saved on disk are deleted over time creating gaps on the disk.

·        New files fill up the gaps, but may need more space than the gap provides resulting in fragments of the file being spread across the disk.

·       Rearranges part of files back to contiguous space, makes access quicker.

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Compression

·       Reduces the size of the file

·       Takes up less disk space

·       Quicker to download over the internet

·       Compressed files must be extracted before it can be read.

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Full Backup

·       Every file is copied to an alternative storage device.

·       Files can be recovered if it is deleted or corrupted.

·       Can be slow to copy large number of files

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Incremental backup

·       Only the files that have been changed since the last backup are copied.

·       Files can be recovered if it is deleted or corrupted.

·       Much quicker than a full backup.

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