Sign language alphabets
Manual alphabet is used to fingerspell a series of the alphabetical letters to form a phonetic or a spoken/written word of another language. E.g. a person's name, a place, a technical word, etc.
American manual alphabet
You can download the poster (pdf) of American Manual Alphabet.
There are different manual alphabets around the world. Some countries have similar manual alphabets with a few modifications, borrowing an alphabet from one another, but their signed languages remain distinct.