Which item was key to how Microsoft got its start in the 1970s? a. artificial intelligence b. vacuum tubes c. Altair 8800 d. UNIX​

How can you know if the person or organization providing the information has the credentials and knowledge to speak on this topic? one clue is the type of web site it is--the domain name ".org" tells you that this site is run by a nonprofit organization.

How do we use the sumif formula (when dealing with different formats) ?

What are the three uses of a screw?