Happy Birthday DM42L (sample)

[Thomas Okken]

(02-18-2017 02:36 AM)rprosperi Wrote:  Points taken, though a marketing video does not a true prototype make.

From merriam-webster.com:

Definition of prototype
1: an original model on which something is patterned : archetype
2: an individual that exhibits the essential features of a later type
3: a standard or typical example
4: a first full-scale and usually functional form of a new type or design of a construction (as an airplane)

In the video you're referring to, they didn't just show a mock-up, they showed a working calculator. That is a prototype. :-)