The Commodore VIC-20 was the first computer to ever sell over 1 million units, and can be regarded as the beginning of the mainstream computer age. It was not particularly useful for business applications, but was well-received for the many games available. It was also the first relatively inexpensive colour computer, costing less than $300. It is the predecessor of the significantly more well known Commodore 64, which is the highest selling single computer model of all time.
Kotensoft