There is one assignment where you must track changes in corporate managment over the years: find out who was working where and in what position, etc...
You can do this by accessing Mergent Manuals
and entering in your company name. Each entry lists the company
officers for that year. There are previous years available - in fact,
Example from late 90's Hewlett Packard:
Here is the original blog entry about Mergent Manuals.