H series may refer to:
*
H series (Toronto subway)
The H series was the third series of rapid transit rolling stock used in the subway system of Toronto, Ontario, Canada. They were built in six production sets, named H1 to H6, from 1965 to 1990 in Thunder Bay, Ontario, for the Toronto Transit Co ...
, a line of subway cars
*
Isuzu H series, a line of trucks
*
''QI'' (H series), the eighth series of the TV quiz show ''QI''
See also
*
G series (disambiguation)
*
I series (disambiguation) I series may refer to:
* IBM System i
The IBM AS/400 (Application System/400) is a family of midrange computers from IBM announced in June 1988 and released in August 1988. It was the successor to the System/36 and System/38 platforms, and ran t ...
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