I want to know the answer to the following question:
On what grounds did Apple sue Microsoft and Hewlett-Packard in 1988?
All the background I'm provided with is that "In 1988, Apple sued Microsoft and Hewlett-Packard on the grounds that they infringed Apple's copyrighted GUI, citing (among other things) the use of rectangular, overlapping, and resizable windows.". Is that enough to answer the question?
Answer: yes