Network effects earned OpenTable the position of world's largest online restaurant reservation system because

Are special combinations of keys that tell a computer to perform a command. keypads multi-keys combinations shortcuts

You wanted to look up information about alzheimer's, but you were unsure if it was spelled "alsheimer's" or "alzheimer's." which advanced search strategy would be useful? a) a boolean search b) using a wild card in your search c) trying different search engines d) doing a search for "alsheimer's not alzheimer's" asap. ill give brainlist.

How to do this programming flowchart?