Bear in mind that Google has just (last two days of so) started recognising "stop words" in phrases. So an a to z of computers will probably only recognise the word COMPUTERS, but "an a to z of computers" (note the quotation marks) should recognise the whole lot. You could get the first version to work by entering +an +a +to +z +of computers
but even sticking in the + sign doesn't work on THE - although Google did announce that they may even include that word in the future.
Google has also announced that their index should be reindexed more frequently - perhaps not as often as the 9-12 days claimed by some engines, including (I believe) AllTheWeb, but not to be sniffed at. And of course, there is Google's Image search and non-html file coverage - both of which put everyone else in the shade. All of which makes me wonder - if Google is so good, how come I make extensive use of AllTheWeb? I love Google, but I still find AllTheWeb outperforms Google 35-40% of the time. It's not down to AllTheWeb's new query rewriting - I use that very sparingly since, as often as not, it completely wrecks the query I'm trying to post. Despite the enhanced News coverage at AllTheWeb, Moreover outperforms both of them for currency, and news.altavista.com offers by far the best archival news search. (Can't imagine that I would use AltaVista much for anything else, though). But when oh when will one of these great engines come up with the kind of flexibility that Northern Light has been offering for years? Full Boolean, end-truncation, internal single- and multi-character wildcards, nested parentheses, automatically re-running your search as an alert... fantastic! If Google or AllTheWeb start offering that kind of funcationality, that really will be the killer engine!