... software¹

Gnu Ghostscript is an example of that special software.

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...make²

Microsloth's nmake will do.

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... window.³

A command line window is also called a ``DOS box'' or a ``cmd window''.

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... Return⁴

On some keyboards, there is a Return key. On other keyboards, there is an Enter key. On still other keyboards, the equivalent key contains a bent arrow; from its start, it moves down, then turns to your left. It ends with the arrow head pointing left.

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