Era
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2016 --
1
2017-
1
20th century
16
20th century --
8
20thh century
1
21st century
10
21st century --
5
21th century --
1
392-814
1
6th cent.B.C.
1
980-1037
1
Data processing
1
Early work to 1800
3
Early work to 1800 --
1
Early works to 1800
7
Early works to 1800 --
2
Medieval, 500-1500
1
To 1500
1
To 500
1
To 500 --
1