Achievement badges
Action game
Activation tool
Activity metrics
Activity streams
Ad equivalency value
Ad networks
Advergame
Advertising
AdWords
Affiliate marketing
Affinity
Affinity impulse
Aggregator
Algorithm
Alternate reality game (ARG)
Altruistic impulse
Ambient intimacy
Ambivalent networks
Anchor text
Anomie
APIs
Apps
Ask your network
Augmented reality (AR)
Authority
Authority-building content
Back story
Backchannel
Backlink
Badges
Banner ads
Baseline
Behavioral segmentation
Behavioral targeting
Benefit segmentation
Black hats
Blog Value Index (BVI)
Blogs
Bonding social capital
Bounded rationality
Brand butlers