Timeline for all types of games by Hewlett-Packard

Year	Prod.
1966	1
1976	1
1978	2
1979	4
1980	7
1982	4
1983	1
1984	6
1985	19
1986	5
1987	5
1988	6
1989	4
1990	2
1991	7
1993	3
1994	1
1995	1
1998	2
1999	2
2000	1
2009	1

85 games with valid date were considered for this timeline (84.16% of the total)
16 games with invalid date.

Please help us in our quest to found exact dates for:

198?: 16 games.

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