I just did a search on Google for "blau" and found out that one of its meanings (several were referenced) is the word "blue" in the German language.
I did not, however, see any references to radio manufacturers named simply "Blau" (there were references to music publishers by that name, as well as to "Radio Blau", a German Internet radio station), so in the context of the post we are discussing it may well have been just a non-standard abbreviation for Blaupunkt.
BTW, as ElectronicM pointed out in his post, there is a lot of (
too much, IMO) shortening of words in contemporary American speech and writing these days; we have, in large part if not totally, the huge popularity of text messaging (not to mention tweeting) to thank for that. It's a trend that isn't likely to end or to reverse itself any time soon, at least as long as tweeting and texting are as popular among teenagers and young adults as they seem to be at this time, so we'd better get used to it.
Thankfully (if this is any consolation), however, there is a ban on texting while driving in many U. S. states. This is not yet a national ban (though, IMO, it darned well should be), so there are still many areas of the country in which it is still legal to tap away on a cell-phone keyboard while behind the wheel. I saw on television about a year ago, to my surprise, a report of a young woman who actually was texting on
two cell phones at once, and trying to drive her car at the same time -- and steering the car with her knees!
Good grief! Didn't that person realize what a heck of a risk she was taking?
The instruction manuals for most if not all cell phones have (or should have) a warning against texting while driving. The warning in the instructions for my own TracFone cell is simply (in paraphrase) that one's sole responsibility while driving is and must always be to the road ahead. If a call arrives while you are driving, let it go to your voice mail, and if you must make a call, pull off to the side of the road before dialing and talking once the other party answers.
If more people read and heeded this warning, there would be a heck of a lot fewer fatal car crashes on America's roads caused by ignorant cell phone users. I'm sure a lot of this comes from teenagers who think "it will never happen to them" as far as automobile accidents are concerned; kids of this age think they are invincible and can get away with darned nearly anything, including fiddling with a cell phone when they should be focused on the road on which they are driving. I bet most teenagers would change their habits in a hurry if they had an accident in which their father's car (which the teenager was driving) was totaled because the kid was trying to send a text message while behind the wheel. The father would almost certainly hit the roof and likely would take the kid's car keys away, for weeks or months if not forever -- if the teen's driver's license was not suspended or revoked first.