Motorola announced today that it would buy Symbol Technologies Inc. for $3.9 billion. The move will position Moto as the world’s largest seller of hand held bar-code scanners.

The companies have had a close relationship for years, so this isn’t too much of a surprise. Nevertheless, the acquisition could beef up Motorola and aid their run at taking cell market dominance from Nokia. Symbol makes heavy-duty devices for POS and warehouse systems and most of their products could really benefit from Motorola’s wireless expertise while Moto’s products would go great inside Symbols hard-shell cases. Win win, it looks like.