Mandatory Credit: Photo by REED SAXON/AP/REX/Shutterstock (6599574a) Kupferman Horowitz Lyn Kupferman, right, and her friend Shiela Horowitz wait as a Tower Records clerk rings up the purchase of over $200 in Beatles and John Lennon albums, in Los Angeles JOHN LENNON SHOT 1980, LOS ANGELES, USA

The cashier above is using a cash register made by Data Terminal Systems of Maynard, Massachusetts. The best I can tell, it’s either a Series 300 or Series 400 cash register. I am looking for any information I can get my hands on for these two series of registers by DTS. If you have any receipts, documentation, photos, anything, it would be most welcome.

There is very little information on the Internet about Data Terminal Systems, even though they were one of the first electronic cash register companies in the world and their technology was everywhere, especially in the 1970s and 1980s.

I’d like to get as much information about Data Terminal Systems online as possible, before it’s all lost to forgotten history.