You can use System Restore to return the computer file history to an earlier point in time.
Explanation:
System Restore allows you to recover documents/files that may have been deleted if your computer is not operating as it should be. Therefore, the answer is "computer file history".
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Answer:Offers professional document appearance
Explanation:
Answer:
ad-hoc network
Explanation:
Ad-hoc network is a type of network that is setup to allow computers to talk to each other without the use of a router or server. The computers communicate directly with each other. In windows operating system ad-hoc is implemented as a communication mode which can be turned on.
Answer:

In some cases, one con is that it can be hard to keep track of your identation when coding long lines or blocks. The pro is that you may need to learn, which is not a bad thing. Learning is good.
Answer:
SELECT last_name, job_title, hire_date FROM employee WHERE hire_date>="01-12-2016" AND job_title != "STOCK CLERK" ORDER BY job_title DESC;
Explanation:
The SQL code queries the employee table returning records of the last_name, job_title, and hire_date columns matching the employees hired on or after December 2016 and job titles that are not stock clerks in the employee table.
The WHERE and AND clause is responsible for the condition while the ORDER BY clause returns the query result in the of the job title in descending order.