Research into Companies and their Logo's

The day went by so fast, the task was to do some online research on different types of Logo's e.g big companies like apple. I, myself am a fan of comic books. so I decided to go for the typical comic-book companies, Marvel & DC comic's.
 

 we had work-sheets that we wrote any valid information we found the companies, another thing we had to do for each company that we wrote about was to attempt to draw the companies logo. I'm pretty sure that we had to do this because it would show the difficulty, and how Logo's are not just drawn by hand, but they are planned out very carefully sketched and layed out, with exact precission.