a-Si stands for Amorphous Silicon
A-SISO-MULT stands for Adaptive Soft-Input/Soft-Output with Multiple Estimators
A-SISO stands for Adaptive Soft-Input/Soft-Output
A-SISO-SING stands for Adaptive Soft-Input/Soft-Output with Single Estimator
A-PET stands for Animal Positron Emission Tomography (imaging)
A-OLS stands for Advanced Operational Line Scanner
A-P stands for Anterior and Posterior
A-PAM stands for Asymmetric Pulse Amplitude Modulation
a-RITD stands for Asymmetric Resonant Interband Tunneling Diode
A-PK stands for Cyclic AMP-dependent (Adenosine Monophosphate) Protein Kinase