(No, you didn't miss Part 4 - I just did some renumbering so the articles would list in the correct order by default.)
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When it came to storing the checkbox data in a database or some other data, however, I found myself thinking about a number of different factors/possibilities/requirements, including:
- Checkboxes in a simple queue
- Checkboxes in a file loaded ABC browse
- Checkboxes in a page loaded ABC browse
- Storing results in a database
- Storing results in non-database form (e.g. XML)