Logos as guidance

People see logos, at worst, as pretty pictures and sometimes as conveying softer values of a company's character but sometimes they can help save lives (?)

We are surrounded by logos or " a graphic element, symbol or icon" (ref: http://en.wikipedia.org/wiki/Logo) which help us live our lives and also can save our lives. This following article brought this to mind:
http://news.bbc.co.uk/1/hi/health/6120138.stm

We're always looking for a personal referral and logos do this too! They can act as a stamp of approval such as the recycling logo or the ISO 'stamp' for quality assurance.












As a footnote to logos as guidance I thought I'd mention road signs and they way their iconography has passed into design: check out the lousebusters logo!http://news.bbc.co.uk/1/hi/health/6111476.stm

From no right turn to ghostbusters to lousebusters. Nit anyone?