Abbreviations
ACPC : Average cost per click
ADWORDS : Google's PPC (pay-per-click) System
APP : Also APPS, Mobile App, Native App, Mobile Web App
An app is a focused mobile software application that typically provides a solution to a single problem. Not to be confused with broad software solutions found on traditional desktop computers, although an app could solve a large problem. An app is normally very focused, has a small form factor, and should be fast and efficient
ATW : All the web
AV : Alta Vista
B2B : Business to Business
B2C : Business to Consumer
BOGOF : Buy One Get One Free
CPA : Cost Per Acquisition
CPC : Cost Per Click (PPC average, or as an aggregate of multiple PPCs)
CPL : Cost Per Lead
CPM : Cost per 1000 impressions
CTR : ClickThrough Rate
DIR : directory
DMOZ : ODP : Open Directory Project
DTC : Direct to consumer
FFA Links : Free For All Links (aka Link Farms)
FW : Findwhat
G : Google
Greybarred : Banned from Google
IYP : Internet yellow pages
IBL : InBound Links or Incoming Back Links
KEI : Keyword Effectiveness Indicator (Wordtracker metric)
KW : Keyword, -KW : Negative Keyword
LS : Looksmart
LY : Lycos
MCPC : Max cost per click
MNCPC : Minimum cost per click
Organic Results : SERP results due to algorithmic placement
ODP : Open Directory Product (DMOZ)
OV : Overture
PDR : Paid inclusion directory
PFI : Pay for Inclusion
PL : Paid for links
PPC : Pay Per Click
PPL : Pay per lead
PR : Page Rank (Google)
RSS : RDF Site Summary or Rich Site Summary, an XML format for syndicating Web content.
ROAS : Return On Advertiser Spending
ROI : Return On Investment 
SBD : Microsoft’s Small Business Directory
SE : Search Engine
SEM : Search Engine Marketing (or marketor)
SEO : Search Engine Optimization (or optimizer)
SERP : Search Engine Results Page (usually organic listings)
SEM : Social Media Marketing (Facebook, Twitter, YouTube, etc)
SOPA : Stop Online Piracy Act (SOPA), also known as H.R.3261
SWOT : MBA Speak for Strengths, Weaknesses, Opportunities, Threats (normally a report)
WA : Wise Apps, WiseApps, or WiseApp Wise App (c) 2011 Wise Apps, LLC
Y or Y! : Yahoo
BS - Blog Spam
EPC : Earnings per click
SES : Search Engine Strategies
GG : GoogleGuy - Matt Cutts of the Search Quality group in Google




