I believe it is an optical storage system that uses lasers to read data.
In English grammar, a period is typically the end mark used after a request or a command, denoting the end of the sentence. However, if the command indicates forceful or passionate emotion, an exclamation mark may be used.
In English grammar, different end marks are used to denote various styles of sentences. For requests or commands, which are typically framed as imperative sentences, a period is routinely used as the end mark. For example, when one says 'Please close the door.', the period is used at the end to indicate the completion of this command.
However, remember that the nature of the command might sometimes require an exclamation mark instead of a period if the command is intense or full of emotion for example 'Get out!'. It signifies a more forceful or passionate imperative. However, these are exceptions and in most cases, a period is the end mark you would use after a command or a request.
Learn more about End Marks here: brainly.com/question/189344
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Answer:
Period
Explanation:
Periods signal the end of a statement, an indirect question, and a mild command or polite request.
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