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Application File Types & Licences
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Software Licences
Open Source
Software licences define how software can be redistributed and used.
When you purchase software you purchase a licence & agree to its terms.
Two main kinds are:
- Open Source
- Proprietary
Permission to use the software and access to view & modify the source code.
+ Simpler licensing.
+ Source code can be modified.
+ Fast update cycle.
+ Less "tie-in" due to open standards.
- Software can be abandoned.
- Difficult to maintain.
- No professional support.
- Source code can identify security flaws.
Proprietary
Permission to use the software but intellectual property rights retained.
+ Expectation that software is maintained.
+ Simpler to update.
+ Good professional support.
+ Better usability.
- Complicated licensing.
- Source code cannot be modified.
- Updates can take a long time.
- Can be difficult to change software.
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Application File Types & Licences
Word Processors
DOCX - Default for Word 2007 onwards. Smaller file size than DOC, can't save macros (good for security).
DOC - Default for pre Word 2007.
RTF - Very old alternative. Can't save many formatting features but this reduces file size.
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Application File Types
Presentations
PPTX - Default for PowerPoint 2007 onwards. Smaller file size than PPT, can't save macros (good for security).
PPT - Default for pre PowerPoint 2007.
PDF - Used for Presentations & other software like Word Processors. Highly compatible but can't be edited once saved.
Different types of application use different file types.
But sometimes file types are specific to an actual program e.g. Microsoft Word.
File types can affect the features available to you.
It can also affect file size but less so than with images.
Spreadsheets
XLSX - Default for Excel 2007 onwards. Smaller file size than XLS, can't save macros (good for security).
XLS - Default for pre Excel 2007.
CSV - Stores no formula, formatting or multiple worksheets. Small file size good for importing data into a database.
Databases
ACCDB - Default for Access 2007 onwards. Provides additional features like multi-value fields, attachment type & better encryption.
MDB - Default for pre Access 2007.