i_don_t_know 11 days ago

The issue contains a lot of interesting information about the APL\3000 system, in particular, tricks used in the implementation.

A complete list of issues of the hp journal is available at:


  • pjmlp 11 days ago

    Thanks for pointing it out.

    It is a gold mine of systems programming languages articles, in a world where C wasn't yet something that actually mattered.

jxy 11 days ago

It's amazing how much a few KB of memory could achieve then. APL may perform extremely well on phones and watches nowadays. I can't believe no one is doing it.

I have J on my phone, and it works well as an advanced programmable calculator.

leephillips 11 days ago

Got to love Fig. 2. APL was the first language I learned, in 1976. When I was in the position to have to use Fortran, I was horrified. I have to write loops for everything?! But nowadays, I think array Fortran is quite nice.

  • 3rdAccount 11 days ago

    Because you at least don't have to write classes for everything? :)

mchahn 8 days ago

In the first paragraph" "..its ease of programming and debugging."

APL is one of the most unapproachable languages I every learned.

glhaynes 11 days ago

Slashes and backslashes got pretty wild in the '70s and '80s.

  • rbanffy 11 days ago

    There were lots of jokes about OS/2 being just half an OS.

agumonkey 11 days ago

that cover page is so damn glorious..

and fig 2 / page 5 is epic

unixhero 11 days ago

mmm dat keyboard

  • rbanffy 11 days ago

    It was good, but the IBM beam spring ones were better. They still beat anything else, before or since.

    I've played with J, but APL, with the symbols, feels nicer.

    Even though it's almost impossible to dictate code to someone when pair programming.

    • Fellshard 11 days ago

      There's a few videos on YouTube of someone demoing APL in a modern context, and dictating the meaning of the symbols aloud; it felt strangely cryptic, but I'm sure someone who's worked with APL for some time would probably be able to latch onto it okay.

    • drallison 10 days ago

      There are English names for all of the special APL symbols so speaking in APL was both possible and common.