Useful Search Marketing Acronyms

While browsing in the internet I found 32 search marketing acronyms that might be useful for me and you.
Here are some of them:

1. BL = Backlink
2. CPC = Cost Per Click
3. CSS = Cascading Style Sheet
4. HTML = HyperText Markup Language
5. IBL = Inbound Link
6. OBL = Outbound Link
7. PPA = Pay Per Action
8. PPC = Pay Per Click
9. PR = PageRank
10. RSS = RDF Site Summary, Rich Site Summary, Really Simple Syndication
11. SE = Search Engine
12. SEM = Search Engine Marketing
13. SEO = Search Engine Optimization (Optimisation)
14. SERP = Search Engine Results Page
15. XML = Extensible Markup Language

More can be read here.