Python uses duck typing and has typed objects but untyped variable names. This document was partly typed and partly handwritten. For example, on the Dell keyboard Model RT7D20 only 16 letters can be typed. Users typed commands after a prompt character was printed. They'd say a few pages, I just typed it. Thus, the surrender document could not be typed. Ann typed his manuscripts and reviewed his writing. It is a feature present in some strongly statically typed languages. Variables are dynamically typed and lexically scoped. Looking for inspiration, Derrickson typed the word "horror" into flickr and searched through 500,000 images. Statically typed languages can be either "manifestly typed" or "type-inferred". These languages have been dynamically typed, and reflective. Any four digits are typed in and accepted as a valid PIN. The Java virtual machine provides some support for dynamically typed languages. Systems based on statically typed languages are technically feasible, however.