(+)Frequency correction

2-D trajectory correction

3D rotational correction

3-phase power factor correction

a house of correction

aberration correction

absorption correction

acceleration correction

accidental coincidence correction

accidental-coincidence correction

Accurate correction

acoustic correction

acoustic moveout correction

acoustic velocity profile correction

action correction

active correction

Active Power Factor Correction

active power factor correction APFC

Active Power Security Correction

activity correction coefficient