P - Probe

Z - Zealot
D - Dragoon
T - High Templar
K - Dark Templar

S - Shuttle
V - Reaver
O - Observer

S - Scout
C - Carrier
A - Arbiter
O - Corsair

Spells

T - Psionic Storm (Templar)
L - Hallucination (Templar)

R - Recall (Arbiter)
T - Stasis Field (Arbiter)

D - Disruption Web (Corsair)

F - Feedback (Dark Archon)
C - Mind Control (Dark Archon)
E - Maelstrom (Dark Archon)

Specials

L - Load (Shuttle)
U - Unload (Shuttle)
R - Recharge Shields(S.B.)
I - Build Interceptors
R - Build Scarabs

B - Basic Structure

Then...

N - Nexus
P - Pylon
A - Assimilator
G - Gateway
F - Forge
C - Photon Cannon
Y - Cybernetics Core
B - Shield Battery

V - Advanced Structures.

Then....

R - Robotics Facility
S - Stargate
C - Citadel of Adun
R - Robotics Support Bay
F - Fleet Beacon
T - Templar Archives
O - Observatory
A - Arbiter Tribunal

Forge

W - Ground Weapons
A - Ground Armor
S - Plasma Shields

W - Air Weapons
A - Air Armor
S - Singularity Charge

Citadel of Adun

L - Leg Enhancements

Robotics Support Bay

S - Scarab Damage
C - Increase Reaver Capacity
G - Gravitic Drive

Templar Archives

P - Psionic Storm
H - Hallucination
K - Khaydarin Amulet
M - Mind Control
E - Maelstrom
T - Argus Talisman

Fleet Beacon

A - Apial Sensors
G - Gravitic Thrusters
C - Increase Carrier Capacity
D - Disruption Web
J - Argus Jewel

Observatory

G - Gravitic Booster
S - Sensor Array

Arbiter Tribunal

R - Recall.
S - Stasis Field.
K - Khaydarin Core.