What languages did you learn, in what order?

I once compiled the following list of programming languages and which year I started learning them:
  • 1981: Sinclair BASIC (on a ZX81)
  • 1983: BBC BASIC (on a BBC Micro)
  • 1985: Pascal (installed via ROM)
  • 1987: Logo
  • 1987: 6502 Assembly (on a BBC Micro)
  • 1989: ARM assembly (on an Acorn Archimedes)
  • 1992: Casio fx-7700 BASIC
  • 1992: C (using the excellent Norcroft compiler for Acorn computers)
  • 1994: C++ (the awful Beebug Easy C++)
  • 1995: UFI (on a VAX running OpenVMS)
  • 1996: StrongARM assembly
  • 1996: Standard ML
  • 1997: Mathematica
  • 1998: Quake C
  • 2004: OCaml
  • 2006: Java
  • 2007: Common Lisp
  • 2007: Scheme
  • 2007: Scala
  • 2007: Haskell
  • 2007: F#
  • 2009: Clojure
  • 2010: HLVM
  • 2017: Elm
  • 2017: Javascript
I was recently concerned to hear from Socio-PLT: Quantitative and Social Theories for Programming Language Adoption that the number of languages a programmer knows stagnates after the age of just 20. The decade is nearing its end but I have only learned three languages. Now I'm wondering which languages I should learn next...

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