 From his multi-year collaborative collection of word definitions he first developed in 1968 his "Slipara vortaro" ("Filing dictionary") and later, in the computer age, the "Perkomputora termino-kolekto" ("Collected computer terms" or Pekoteko).From 1983 to 1990 he edited six extensive volumes of "Akademiaj studoj" ("Academic studies").In the World Esperanto Association (Universala Esperanto-Asocio or UEA), Eichholz was active as a committee member for Canada (1988–92) and for decades as a special-interest-group delegate for world federalism, Unitarianism and Esperanto terminology.