Here's a complete list of all the things that you can CONSULT the Hitchhiker's Guide about.
You should use it only as a last resort, or for your interest once you've finished the game.
ALCOHOL
ATOMIC VECTOR PLOTTER
BABEL FISH
DAMOGRAN
EARTH
FLUFF
FRANCE
GALACTIC SECURITY AGENCY
GALAXIA WOONBEAM
GREEN BUTTON
HEART OF GOLD
INFOCOM
BROWNIAN MOTION
GENUINE PEOPLE PERSONALITIES
MAGRATHEA
HITCHHIKER'S GUIDE
IMPROBABILITY DRIVES
INTELLIGENCE
LARGE PLUG
LONG DANGLY BIT
MATTER TRANSFERENCE BEAMS
PAN-GALACTIC GARGLE BLASTER
PERIL-SENSITIVE SUNGLASSES
PROTEIN
NUTRIMAT
RAVENOUS BUGBLATTER BEAST OF TRAAL
RED BUTTON
SANTRAGINEAN MINERAL WATER
SIRIUS CYBERNETICS CORPORATION
SMALL PLUG
SMALL RECEPTACLE
SPACE
THUMB
TOWEL
VOGON POETRY
VOGONS
WALKING
Various tools
Various weapons
