There are many acronyms in SEO that can confuse the average person. Here is a list of the main ones that come to mind:
BL - Backlink
CPC - Cost Per Click
CSE - Comparison Shopping Engine or Custom Search Engine (Google)
CSS - Cascading Style Sheet
DC - Data Center
DMOZ - Directory - Mozilla
HTML - HyperText Markup Language
IBL - Inbound Link
IDF - Inverse Document Frequency
LSA - Latent Semantic Analysis
LSI - Latent Semantic Indexing
MLX - Extensible Markup Language
MRI - Multiple Reverse Indexes
OBL - Outbound Link
ODP - Open Direcrory Project, See DMOZ
OWBL - One way back link
PPA - Pay Per Action
PPC - Pay Per Click
PR - PageRank
RSS - Simple Syndication
SE - Search Engine
SEM - Search Engine Marketing
SEO - Search Engine Optimisation (Optimization)
SERP - Search Engine Results Page
SI - Supplemental Index
SWL - SiteWide Link
TBPR - Toolbar PageRank
TR - Trust Rank
VIPS - Visual-block Page Segmentation
I will be writing an article on each of these SEO acronyms in the forth coming weeks so keep coming back to the site and keep up your learning curve. If you would like me to add any to this list please email me and ill add them for you.