200 OK - The request has succeeded. The information returned with the response is dependent on the method used in the request.
301 Moved Permanently - The requested resource has been assigned a new permanent URI and any future references to this resource SHOULD use one of the returned URIs.
302 Found - The requested resource resides temporarily under a different URI. Since the redirection might be altered on occasion, the client SHOULD continue to use the Request-URI for future requests.
304 Not Modified - If the client has performed a conditional GET request and access is allowed, but the document has not been modified, the server SHOULD respond with this status code.
307 Temporary Redirect - The requested resource resides temporarily under a different URI. Since the redirection MAY be altered on occasion, the client SHOULD continue to use the Request-URI for future requests.
400 Bad Request - The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repeat the request without modifications.
401 Unauthorized - The request requires user authentication. The response MUST include a WWW-Authenticate header field containing a challenge applicable to the requested resource.
403 Forbidden - The server understood the request, but is refusing to fulfill it. Authorization will not help and the request SHOULD NOT be repeated.
404 Not Found - The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.
410 Gone - The requested resource is no longer available at the server and no forwarding address is known. This condition is expected to be considered permanent.
500 Internal Server Error - The server encountered an unexpected condition which prevented it from fulfilling the request.
501 Not Implemented - The server does not support the functionality required to fulfill the request. This is the appropriate response when the server does not recognize the request method and is not capable of supporting it for any resource.
AJ Ask Jeeves (a search engine)
AOL America Online (a search engine)
API Application Programming Interface
ASCII` American Standard Code for Information Interchange
ASP Microsoft Active Server Pages (file.asp)
Application Service Provider (e.g. a provider of web based applications)
AV AltaVista
B2B Business to Business
B2C Business to Consumer
B2E Business to Employee
CAPTCHA Completely Automated Public Turing Tests to Tell Computers and Humans Apart
CPA Cost per Acquisition
Cost per Action
CPC Cost per Click (Google’s PPC Program)
CTR Click through Rate
DMCA Digital Millennium Copyright Act
DMOZ Directory Mozilla (a directory)
DNS Domain Name System
FTP File Transfer Protocol
GUI Graphical User Interface
HTML Hypertext Markup Language
HTTP Hypertext Transfer Protocol
IBL Inbound Link
ICANN Internet Corporation for Assigned Names and Numbers
ICRA Internet Content Rating Association
ISAPI Internet Server Application Program Interface
ISP Internet Service Provider
KEI Keyword Effectiveness Index
LSI Latent Semantic Indexing
MLM Multi Level Marketing
NDA Non-Disclosure Agreement
OBL Outbound Link
OOP Over Optimization Penalty
PPC Pay per Click
PR Google Page Rank™
ROI Return of Investment
RSS Rich Site Summary
SE Search Engine
SEM Search Engine Marketing
SEMPO Search Engine Marketing Professional Organization
SEO Search Engine Optimization
SERPs Search Engine Results Pages
SMM Social Media Marketing
TLD Top Level Domain
W3 World Wide Web
W3C World Wide Web Consortium