Can't reproduce HP-28 operations as objects example

[Giuseppe Donnini]

You are confusing two things here.

It's not the example that is better, but the calculator!

Replacing LIST\-> DROP by HEAD (which is simply not available on the HP-28, nor on the HP-48SX, for that matter) has no impact whatsoever on the problem at hand. But something else has: On the '48 (both SX and GX), pressing [LS] + {} automatically activates program mode (formerly known as ALPHA mode) for you. And it also adds the closing brace.