What consist(s) of a series of related instructions that tells the computer what to do and how to do it

Software program.

Explanation:

Unlike hardware which describes physical entities of a computer, a software program or simply a program (or even simply, a software) is a set of instructions or data that commands the computer on specific tasks to be performed and how they (the tasks) are performed.  Examples of a software are internet browser applications such as Google Chrome, Internet Explorer, and Mozilla Firefox and graphics applications such as Photoshop and Corel Draw.

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