I think that the year was 1978 when the disagreement began.
A settlement was reached a few years later.
“So, we have an agreement now?
“We have an understanding?”
All parties agreed. It was fair and equitable.
The party of the first part agreed not to enter the computer business with the understanding that the party of the second part had agreed not to enter the music business.
What changed?
tnkerr-Writing Prompts and Practice 