Here are some of the words, phrases and acronyms relevant to internet marketing - enough to get by in most situations, but also few enough to read in a few minutes.

Please add a comment if you think anything should be added or improved.

A/B split test - testing alternatives simultaneously

AB split test - testing alternatives sequentially (eg. one per day)

ABAB split test - testing alternatives sequentially, repetitively

ABM - Automated Bid Manager

API - Application Programming Interface

B2B - Business To Business

B2C - Business To Consumer

B2E - Business To Employee

ccTLD - Country Code Top Level Domain

CMS - Content Management System

CPA - Cost Per Acquisition

CPA - Cost Per Action

CPC - Cost Per Click

CPD - Cost per Day

CPI - Cost Per Impression

CPIC - Cost per Inbound Call

CPL - Cost Per Lead

CPM - Cost Per Thousand

CPS - Cost Per Sale

CPT - Cost Per Time

CPV - Cost Per View

Creative – Form of link provided by the advertiser, eg. banner, text, button

CRO - Conversion Rate Optimization

CTR - Click Through Rate

CRM - Customer Relationship Management

DNS - Domain Name System

eCPA - Effective Cost Per Action

eCPM - Effective Cost Per Thousand

EPC - Earnings Per 100 clicks

EPC - Earnings Per Click

EPM - Earnings Per 1,000 impressions

FTP - File Transfer Protocol

ICANN - Internet Corporation for Assigned Names and Numbers

IM - Internet Marketing

IM - Instant Messaging

IP - Intellectual Property

IP - Internet Protocol

ISP - Internet Service Provider

KEI - Keyword Effectiveness Index

Landing page – the page where a prospect arrives. Eg. a merchant’s website with a CPA offer, a bridge page on the affiliate's website, or a parking page (as used in domaining)

LPO - Landing Page Optimization

LT - Live Transfer

MLM - Multi Level Marketing

Multivariate split testing - multiple A/B tests (on one page)

ORM - Online Reputation Management

P2P - Pay To Play

Pixel - javascript or image tag used in tracking in affiliate marketing

PLR - Private Label Rights

PPA - Pay Per Action

PPC - Pay Per Click

PPI - Pay Per Impression

PPL - Pay Per Lead

PPR - Pay Per Rank

PPS - Pay Per Sale

PPT - Pay Per Tweet

PPV - Pay Per Visitor

PR - (Google) Page Rank

PSA - Public Service Ad

Publisher – Affiliate marketer

Ramping Up – Growing a successful (test) campaign

ROI - Return On Investment

RPV - Revenue Per Visitor

RSS - Really Simple Syndication

Scrubbing – when the network or advertiser discounts (some) traffic due to suspected fraudulent activity

SE - Search Engine

SEA - Search Engine Advertising

SEM - Search Engine Marketing / Marketeer / Marketer

SEMPO - Search Engine Marketing Professional Organization

SEO - Search Engine Optimization / Optimizer)

SEP - Search Engine Placement / Positioning / Promotion

SERP(s) - Search Engine Results Page(s)

SEU - Search Engine Usability

Shaving – Skimming of traffic, leads etc. by the affiliate network or advertiser

SMO - Social Media Optimization

Split testing - Measuring the impact of variables on sales

SQL - Structured Query Language

Street Price – Commission an affiliate network has published for an offer, ie. before negotiation.

Success Page – Confirms a lead or other action to the affiliate network using a pixel

T&C - Terms and Conditions

TCP - Transmission Control Protocol

TOS - Terms of Service

TLD - Top Level Domain

URI - Uniform Resource Indicator

URL - Uniform Resource Locator

URN - Uniform Resource Name

UTC - Universal Time Coordinated

Vertical - Market, eg. insurance

VEO - Visitor Engagement Optimization

W3C - World Wide Web Consortium