Timeline for all types of items produced by
PSS [Personal Soft. Services] [012484]

Year	Items
1982	9
1983	25
1984	13
1985	21
1986	17
1987	23
1988	8
1989	4
1990	3
1991	2

125 items with a valid date were considered for this timeline (91.91% of the total)
11 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 10 items.
19??: 1 item.