Letter is an early 1970s text-based computer game for BASIC designed by People's Computer Company in which one must guess a letter from A to Z, which the computer is "thinking of." The game appeared on page 16 of the book What to Do After You Hit Return or P.C.C.'s First Book of Computer Games.

A Sample Run of the Game

I will think of a letter from A to Z. Try to guess my letter. After each guess, I will tell you if you guessed my letter or if your guess is too high or too low. The lowest letter is `A' and the highiest letter is `Z'.

If you wish, think of the letters from `A' to `Z' arranged in a totem pole with `A' on the bottom and `Z' on the top. If I tell you to try a higher letter, try one closer to the top of the totem pole. If I tell you to try a lower letter, try one closer to the bottom of the totem pole. Enjoy!!!

OK, I have a letter. Start guessing.

What is your guess?a

Too low. Try a higher letter.

What is your guess?z

Too high. Try a lower letter.

What is your guess?*

Hey!!! That's not a single letter. Play fair, now!

What is your guess?don't be so grumpy

Hey!!! That's not a single letter. Play fair, now!

What is your guess?n

Too low. Try a higher letter.

What is your guess?t

Too low. Try a higher letter.

What is your guess?w

Too high. Try a lower letter.

What is your guess?v

You got it!!! Let's play again.