The Texas instrument that's lacking keys. No adding, multipliers, or parentheses. Subtract and divide, those are the choices. And there may be some unpleasant noises.

I’m pointy on top and huge at the base, Mummies used me as their hiding place. I’ve stood so long in the desert sun, Even your Wi-Fi’s not lasted that long.

A river of thoughts flows from its tip, leaving trails of tales on parchment seas. Keeper of records and tales untold, its journey immortalizes every stroke.

I grow every time a second passes, yet I am always behind you. There are a lot of books about me, both fictional and true. Look at me with regret, pride, or curiosity, I just hope you learn from me.

I make deliveries no one requests, usually addressed to castle guests.