The Oxford English Dictionary (OED) is a descriptive dictionary of the English language, published by the Oxford University Press. It traces the historical development of the English language, providing a comprehensive resource to scholars and academic researchers, as well as describing usage in its many variations throughout the world. The second edition came to 21,728 pages in 20 volumes, published in 1989. 

Work began on the dictionary in 1857, but it was not until 1884 that it began to be published in unbound fascicles as work continued on the project, under the name of "A New English Dictionary on Historical Principles; Founded Mainly on the Materials Collected by The Philological Society". In 1895, the title "The Oxford English Dictionary" ("OED") was first used unofficially on the covers of the series, and in 1928 the full dictionary was republished in ten bound volumes. In 1933, the title "The Oxford English Dictionary" fully replaced the former name in all occurrences in its reprinting as twelve volumes with a one-volume supplement. More supplements came over the years until 1989, when the second edition was published. Since 2000, a third edition of the dictionary has been underway, approximately a third of which is now complete.

1. how many volumes does the 2nd edition have?
2. what does OED stand for?
3. what has been underway since 2000?
4. how much is complete?
5. when did work begin on it originally?
6. what is OED?
7. What does it trace?
8. how many pages does the 2nd edition have?
9. what happened in 1933?
10. what was the former name?
11. who uses it as a resource?
12. does it have many variations?
13. are the variations around the world or just one region?
14. when was it republished?
15. when was the title first used unofficially?
16. how many volumes was it when republished?
17. when was the 2nd edition published?
18. what role did the philological society play?
19. who publishes OED?
20. How many supplement volumes did it have when the title changed?

Numbered answers:
1. 20.
2. Oxford English Dictionary
3. A third edition.
4. A third.
5. 1857,
6. The Oxford English Dictionary
7. The historical development of the English language
8. 21,728
9. The Oxford English Dictionary fully replaced the former name
10. A New English Dictionary on Historical Principles
11. Scholars and academic researchers,
12. Yes
13. The world
14. 1884
15. In 1895
16. Ten.
17. 1989.
18. it provided the materials it is based on.
19. Oxford University Press.
20. "12 with 1 supplement.