DRM likely is the answer. Anything that prevents duplication really.
Answer:
September 30, 1985
Explanation: Source: https://www.google.com/search?q=When+Microsoft+excel+helps+is+first+opened&oq=When+Microsoft+excel+helps+is+first+opened&aqs=chrome..69i57j69i61.129j0j7&sourceid=chrome&ie=UTF-8
Merging files involves combining two or more files while maintaining the sequential order of the records.
<h3>What is
Merging files?</h3>
Merging is known to be the act of of taking two or a lot of groups of data in the method of a file or folder, and adding them together into a single file or folder,
There are different kinds of files that exists. A computer file is one that comes in different format and sizes as well as its function. To merge connote to put two or more things together.
Note that, Merging files involves combining two or more files while maintaining the sequential order of the records.
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