Find My iPhone - Apple Inc. Locate your iPhone or iPad, lock or wipe it remotely, and more.
The Elements: A Visual Exploration - Element Collection, Inc
.epub Simplified
Zipped Website Container/Organizer for the eReader
If the book you are writing were a web site, it would have parts like:
- Words
- Pictures
- Fonts
- Links
So ..., "yourbook.epub" could be opened in an Apple iPad, for instance, as a book container with all those parts inside (and maybe more).
Check out the Adobe Video on Publishing EPUB: 
iPad Publishing Format Tips
General Text Tips:
- Indent first line of each paragraph rather than using tabs or spaces.
- Set paragraph styles for body and headings.
- Embedded fonts could cause submission rejection.
General Graphics Tips:
- Place, then cut, then paste graphics at beginning of text where you want to anchor the graphic.
- Graphics ordered from left-to-right and down.
Apex Toll
The Place of Answers
Also available on:
- Kindle: $3.99
- Paperback Book: $12.99
(Eligible for Free Super-Saver Shipping)
Every quality word processor should have an 'Export' or 'Save As' feature for the .epub file extension and structure.
Apple's iWork Pages software is ideally suited to this export feature evolution because it already works well with the XML code that .epub uses.
MS-Word has an excuse for being slow to adopt the Export as EPUB feature because of their .docx court case setback.
More in the future ...