They start out as small, microscopic nests of cells that can only grow to one half a cubic millimeter in size that's the tip of a ballpoint pen.

tool tip

International PEN

Did you leave a tip?

This is her pen.

This is a pen.

Is this your pen?

Whose pen is this?

Whose pen is this?

Which is your pen?

Don't use my pen.

Don't use my pen.

I have a pen.

I have a pen.

Who broke this pen?

The pen is broken.

Pass me the pen.

PEN National Strategic Plan

Don't forget to leave a tip.

Don't forget to tip the waiter.

This pen has run dry.

This pen has run dry.

I can't find my pen.

Give me my pen back.

Can I use your pen?

Do you have a pen?

Do you have a pen?

Can I borrow your pen?

Please write with a pen.

Tom gave me a pen.

who taught by the Pen ,

Who taught by the pen ,

Who teacheth by the pen ,

who taught by the pen ,

Who taught by the pen

It's just the tip of the iceberg.

Early counters were merely lighted surfaces on which the plate was placed, with the colonies marked off with a felt tipped pen on the outer surface of the plate while the operator kept the count manually.

My pen is in my hand.

(The pen is borrowed by me.

He who taught by the pen .

The Resistible Rise of Marine Le Pen

Do you have a pen on you?

Who hath taught mankind by the pen

Who taught ( to write ) with the pen

This example is just the tip of the iceberg.