I want to know the answer to the following question:
When was IBM's system released?
All the background I'm provided with is that "The first version was ready in 1974/5, and work then started on multi-table systems in which the data could be split so that all of the data for a record (some of which is optional) did not have to be stored in a single large "chunk".". Is that enough to answer the question?
Answer: yes