Founded in 1982. In December 1999 sold to S3. Ended production in 2000.
Focused on profi 2D.

1st chipset - Imagine 128, last chipset - Ticket to Ride IV (Revolution IV).
Introduced as 1st:
1983 - first high resolution graphics (1024x768) card (Number Nine Graphics System) for the PC.
1984 - world's first 256 color graphics controller card (Revolution 512x8), world's first "true-color - 16.7 million colors" graphics card (Revolution 512x32) for the PC.
1994 - world's first 128-bit graphics solution (Imagine)
Links: Company History  Revolution 512x32 manual (scanned by Jim Cox)