In article hm1rm1-ujc.ln1@adsl-63-193-121-
233.dsl.snfc21.pacbell.net,
says...

And they moved the ENTER key to
the bottom right and it is the same size as the other keys. But
this would probably only bother someone who had been using other
HP calculators for the last 20 years.

HP was never big on consistency. If you've ever worked with
HP test gear you may get a chuckle out of this.

http://www.robotics.com/hp/

Tektronix seems to have at least made an effort to maintain
some consistency in their designs over the years.

Ned Simmons