Centuries: 6th century - 7th century - 8th century
Decades: 580s 590s 600s 610s 620s - 630s - 640s 650s 660s 670s 680s
Years: 630 631 632 633 634 - 635 - 636 637 638 639 640
Births
Deaths
... optic gyroscope wikipedia.org dumped 2003-03-17 with ...