Occurrence Screen [2(R)->(R)2:2(R)->(G)1:1(F)->(F)1]   | Kernel [1(G)->(R)2]   |
action | A | extended action | Ea | event driver | Ed | subscriber | Su | protocol | O | limited protocol | LP | run routine | RR | broker | B | edit | E | server | Se | P | screenman | SM | inquire | I |