For GMAT you do not only need to know English, but you need the basic and correct English.
You can find a lot of information online about the GMAT. I will only write what I thought it was important. Although most of the information required for the math part is basic, I was surprised to notice that time passed and my knowledge about math was fuzzy sometimes and I also need it an update of the English equivalents of the terms used.
Apple computers need now more then design to sell. From my point of view there is no other major difference. I can get nice design from Sony too.
I just found out how my parents choose my name: Harry Belafonte -Go Down Emanuel Road