Non-Apple Number Pad
The bigger question is why on earth they would draw a mockup with a number pad that doesn't use the Apple number pad layout. As a long-time Mac user, this layout drives me batty, as I end up typing social security numbers as 123+45+6789 and phone numbers as 815+123+4567.
Does anyone really need the + key to take up 2 spaces? Must be the same people who need a Num Lock key.

Why on earth would you put a Num Lock key on the mouse?
The bigger question is why on earth they would draw a mockup with a number pad that doesn't use the Apple number pad layout. As a long-time Mac user, this layout drives me batty, as I end up typing social security numbers as 123+45+6789 and phone numbers as 815+123+4567.
Does anyone really need the + key to take up 2 spaces? Must be the same people who need a Num Lock key.