Cash Register became one of the largest independent cash register companies in the South. By the 80 s we were proficient at installing communicating point-of-sale (POS) systems... accounts with nation-wide installations. How Our Business Started Service, Sales, Support. We ve come a long way since Charlie Blackwell founded a small cash register company... in 1961. In those days, only mechanical cash registers were available. Charlie knew that first rate customer service was the key to his success. With that attitude, Data Cash Register...