She filed a patent relating to memory architecture in electronic calculators.
On February 27, 1961, Evelyn Berezin filed U.S. patent application US 3,187,167, titled "Electronic calculator with dynamic recirculating storage register." This patent concerned innovative memory architecture, specifically dynamic recirculating storage—a technique used to retain data in early computing systems before the advent of modern semiconductor memory.
Recirculating storage registers, often implemented using delay-line memory, were a critical technology in the era before random-access memory became commonplace, allowing calculators and computers to store and continuously refresh data. Berezin's contribution to this area demonstrates her deep technical command of both the logical and physical engineering challenges of early computer memory design.
This invention is significant within the broader arc of her career as it shows her working at the cutting edge of memory technology, a field crucial to the performance of any computing system. Her expertise in storage architecture would prove essential to her subsequent work designing complex, memory-intensive systems such as the United Airlines reservation system and later the Data Secretary word processor, both of which required robust methods for storing and retrieving data reliably and efficiently in real time.