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

Year	Items
1978	1
1981	1
1985	3
1986	3
1987	2
1988	2
1989	6
1990	1

19 items with a valid date were considered for this timeline (90.48% of the total)
2 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 2 items.