Thomas de Colmar's _________ became the first mass-produced mechanical calculator.

Fill in the blank(s) with the appropriate word(s).

Arithmometer

Computer Science & Information Technology

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Is the following HTML code valid?

```

cell 1 cell 2
``` a. Yes. b. No, you cannot code two td elements within the same row c. No, you cannot code a table with only one row d. No, there is a missing closing td tag

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A(n) ________ character is used to represent one or more unknown characters in a string

Fill in the blank(s) with correct word

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A(n) mentor is the person in charge of a Web site's contents. 

Answer the following statement true (T) or false (F)

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Most laser printers have a special ______________ filter that needs to be vacuumed or replaced periodically.

Fill in the blank(s) with the appropriate word(s).

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