Answer:
Look up Charles Babbage. He built a machine that is viewed as the predecessor of the modern computer.
Answer:
To move a picture from your publication to the scratch area, click and drag a picture off of a publication page. Then drop it into the scratch area in Publisher.
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Answer:
userB will use his/her private key.
Explanation:
The steps involved in using asymmetric cryptographic algorithm are as follow:
1. Each user generates a pair of keys to be used for the encryption and decryption of messages.
2. Each user places one of the two keys in a public register or other accessible file. This is the public key. The companion key is kept private.
3. If UserA wishes to send a confidential message to UserB, UserA encrypts the message using UserB's public key.
4. When UserB receives the message, she decrypts it using her private key.

The correct answer is A. true.
It was written in 1948 by the bureau of Labor statistics .
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