Ask HN: What is bioinformatics?

What more do you want beyond what the first few web search hits gives you for that question? One of which is http://www.ebi.ac.uk/luscombe/docs/imia_review.pdf. Or what's on http://en.wikipedia.org/wiki/Bioinformatics ? Or the 2001 paper titled "What is bioinformatics? A proposed definition and overview of the field"? See http://www.ncbi.nlm.nih.gov/pubmed/11552348

Without knowing what you know it's hard to say anything more helpful than those.

Edit: Looking at your HN history, I see you have asked a lot of questions - one per day for the last month - with topics like "Who's doing some c64 stuff?", "CoffeeScript or ClojureScript for writing a game in JS?", "Best server log viewer for Mac?", and the statement "We're planning to release a product for Agile/Scrum professionals, magnetic, erasable story cards that you can use on your Kanban whiteboards."

I get the feeling, perhaps wrongly, that you are using HN as your personal advice board, rather than learning how to research things yourself.