1. It was first made available to the public way back in the 1970s.

2. This is what it looked like back when it launched in 2003.

3. The world of security was quite a bit different back in 2001.

4. We think the stock should be back up at $122.

5. The city put the project back out to bid in 2011.

6. ZDNet takes a look back at very best tech stories and features of 2014.

7. They all are due back in court April 21.

8. Google had a similar arrangement with Twitter back in 2009.

9. The company was one of the first to enter the space with Google Wallet back in 2011.

10. To fight back, the company plans to make big changes in its smartphone strategy in 2015.

11. The Chinese firm has started producing smartphones in Brazil back in 2013.

12. The Windows versions of the threat date back at least to 2011.

13. The city was handed back from British to Chinese rule in 1997.

14. Some of these settlements were already known and date back to 2004.

15. The goal is to bring samples of Mars back to Earth by the 2020s.