I can write, I can fight. If you're like OP, I can tap and click all night. If you're annoyed with someone, you'll tell them to talk to me. What am I?

I have a seat but never sit, I take a load but never quit. A swirl of water does the deed, I take away what you don't need.

Deeply hued in regal dye, Sweet yet tart in tart or pie. A professor, armed with candlestick, Now solve the murder - make it quick!

I can finish a book without finishing a sentence. What am I

I'm a drink you can order at brunch, or you can summon me by saying my name a bunch.