In fact, whether the DVD players play AVI videos or not, it depends on the DVD player model, the AVI video codec or the AVI video resolution/size: 1  Most DVD players only accept MPEG-2 in standard VOBs. 2  Though some newer DVD players can play AVI files, it only plays AVI which is encoded with DivX. However, AVI is a container video format which may encoded with different video codecs like DivX, Xvid, MPEG-4, H.263, WMV, MPEG-1 and etc.
There are 20 stamps that come in a book of stamps. That's the standard amount but you can also buy them in a book of 18, 90, and even 900. The 90 and 900 comes in sheets of 18 stamps each. twenty first class stamps in a book.
The first postage stamps of the UK, the Penny Black, were printed in sheets of 20 rows and 12 columns, but the location on the sheet was indicated by different letters in the bottom corners of each stamp. An A in the lower left corner indicated the first row, a B the second one, the C the third one, etc.