Clairsentience
Clairsentience powers enable a character to learn secrets long forgotten, to glimpse the immediate future and predict the far future, to find hidden objects, and to know what is normally unknowable. They include precognition and remote viewing. A psion who specializes in clairsentience is known as a seer, and is most akin to an arcane diviner. In 3rd edition, Clairsentience is linked to Wisdom.
Metacreativity
Metacreativity powers create objects, creatures, or some form of matter. Creatures a character creates usually, but not always, obey their creator's commands. Powers of the metacreativity discipline include astral construct and greater psionic fabricate. A psion who specializes in metacreativity is known as a shaper, and is most akin to an arcane conjurer. Metacreativity was not introduced until 3rd edition. In 3rd edition, Metacreativity is linked to Intelligence.
Metapsionics
Metapsionic powers generally augment other psionic powers, although the discipline also contains some utility powers. The Metapsionics discipline was introduced in 2nd edition, and was not carried over into 3rd edition. In the 3rd and 3.5 editions, abilities which were part of the Metapsionics discipline in 2nd edition are often handled through metapsionic feats and item creation feats, although some metapsionic powers were converted into Clairsentience or Telepathy powers.
Psychokinesis
Psychokinesis powers manipulate energy or tap the power of the mind to produce a desired end. Many of these powers produce spectacular effects such as moving, melting, transforming, or blasting a target. Psychokinesis powers can deal large amounts of damage. They include energy missile and tornado blast. A psion who specializes in psychokinesis is known as a kineticist, and is most akin to an arcane evoker. In 3rd edition, Psychokinesis is linked to Constitution.
Psychometabolism
Psychometabolism powers change the physical properties of some creature, thing, or condition. They include animal affinity and psionic revivify. A psion who specializes in psychometabolism is known as an egoist, and is most akin to an arcane transmuter. In 3rd edition, Psychometabolism is linked to Strength.
Psychoportation
Psychoportation powers move the manifester, an object, or another creature through space and time. They include astral caravan and psionic teleport. A psion who specializes in psychoportation is known as a nomad, and has no arcane counterpart. In 3rd edition, Psychoportation is linked to Dexterity.
Telepathy
Telepathy powers can spy on and affect the minds of others, influencing or controlling their behavior. They include psionic suggestion and mind switch. A psion who specializes in telepathy is known as a telepath, and is most akin to an arcane enchanter. In 3rd edition, Telepathy is linked to Charisma.