+~Self-checking

Abstract model checking

acceptance checking of fire control

accord checking

account checking machine

accoutant’s checking and calculatin

Accuracy Checking

achievement checking

adaptive self-checking algorithmld

address， checking file program

Adjusting and Checking

Advertising checking bureau

airport security checking

analyse and checking computations

Analytical checking

Anaphylactogen checking

annoyance-based checking procedure ABCP

annual-checking

anomaly checking

anti toppling checking computations