A letter followed by a 2 (occasionally a superscript 2) denotes two turns, or a 180 degree turn.

Before it is registered, it is common practice (with some legal standing) to use the service mark symbol (a superscript SM).

Isotopes Although isotopes are more relevant to nuclear chemistry or stable isotope chemistry than to conventional chemistry, different isotopes may be indicated with a prefixed superscript in a chemical formula.

An email letter (also L mail and letter mail) is a letter which sent as an email using a computer then printed out and delivered as a traditional (physical) letter.

Unpublished letter.

It's a letter.

The letter returned.

Letter from Palestine

Letter to Botswana

Letter of transmittal

Who wrote the letter?

I'm writing a letter.

I'm writing a letter.

The letter was written.

Who wrote a letter?

He wrote a letter.

He wrote one letter.

She wrote one letter.

I read a letter.

Emily wrote a letter.

She wrote a letter.

Sami opened the letter.

Sami opened Layla's letter.

Sami's letter was handwritten.

Sami read the letter.

The letter was ignored.

Letter of transmittal 1

Lakshmi Pratury on letter writing

Did you receive the letter?

Is Jimmy writing a letter?

This is an important letter.

I received her letter yesterday.

I remember mailing the letter.

I remember mailing the letter.

I remember mailing the letter.

Only he read the letter.

Only he read the letter.

He's writing a long letter.

She finished reading the letter.

She finished reading the letter.

Emily is writing a letter.

You should write a letter.

What's written in the letter?

What does the letter say?

Sami continued reading the letter.