What best describes proprietary file format? A format that is closed but free of cost.
A format that is considered a trade secret.
A format that is not bound by copyright law.
A format that is open and free of cost.

The most complicated four letter word

Use the keyword strategy to remember the meaning of the following word. the meaning for the word has been provided. write your keyword and describe the picture you would create in your mind. centurion: a commander in the army of ancient rome. keyword: picture:

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