Hi Marion: I can't resist answering your comment about spilled coffee on keyboards. I inherited my husbands Mac when he got his new PC. He had already put a plastic cover over the keyboard. It did take a bit of getting used to but now I love it. I can remove and wash it and it has been on for at least 3 years and shows no sign of wear and I don't think it was very expensive. I thought I would mention it. Good Luck Lorraine Ottawa, Canada