Timeline for all types of items produced by
Sinclair Research, Ltd.

Year	Items
1980	1
1981	17
1982	58
1983	41
1984	20
1985	9
1986	3
1988	2
1989	2

153 items with a valid date were considered for this timeline (92.17% of the total)
13 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 13 items.