Software History
iPhone HistoryIssues relating to iOS - Wikipedia
Eavesdropping - Wikipedia
https://en.wikipedia.org/wiki/Control_Center_(iOS))
Gregorian calendar - Wikipedia
iOS jailbreaking - Wikipedia
https://en.wikipedia.org/wiki/IPod_Touch_(4th_generation))
https://en.wikipedia.org/wiki/ISSN_(identifier))
Issues relating to iOS - Wikipedia
https://en.wikipedia.org/wiki/Messages_(Apple))
Planned obsolescence - Wikipedia
Microsoft Exchange Server - Wikipedia