Search Engine Talents:
QS
Quoted string for exact match
OW
Obscure words in obscure places
LN
Link search as in "link:http://cap-lore.com/MathPhys" (See ‘Inlinks’ below.)
[Google [OW,QS,LN], encrypted, rules] Yippy, Yahoo [OW, QS], MS (Bing) [QS(?)], Ask, ixQuick [OW, QS], Lycos [QS], Qwant, 百度, 搜狗, Яндекс, Naver (Korea), DDg [OW,QS]

for links: Yahoo Site Explorer (?), Xfinity Altavista (e.g. link: cap-lore.com/MathPhys/IP/);
Hierarchical: Wikipedia; dmoz; OIDs
Scientific Literature: ResearchIndex; Wolfram Alpha
Engineering


Restricted national systems:
EcuRed Cuba (indexes Cuban content only)
搜狗搜索, جستجوی هوشمند فراگیر (meta), Iran filtered.

Other Capability Sites

Google


Search erights.org Search combex.com Search WWW
Search eros-os.org
   (includes email archives)
Search skyhunter.com Search caplet.com
Search cap-lore.com Search waterken.com Search szabo.best.vwh.net

Inlinks

To find pages that link to a given page,
At Blekko enter “link:URL” to find pages with unrendered links to URL.
“link: http://cap-lore.com/CapTheory” works at Bing but only for quoted URL but not links. Yahoo finds even more quoted URLs, but no links.

backlinks too too some luck