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Trademarks must never be abbreviated.

Correct: Take a look at the new features in Adobe® Photoshop® software. Incorrect: Take a look at the new features in PS.

Adobe.... :/

Google has similar guidelines:

* Use the trademark only as an adjective, never as a noun or verb, and never in the plural or possessive form.

[... the very next line ...]

* Use only Google-approved artwork when using Google's logos.

>This includes modifying a Google trademark through hyphenation...