Get Your One-Year Software and DD Library Update Subscription Today The DD Library is updated quarterly. With turnover this quick, it can make it difficult to remember to update your own library on a regular basis. It also means that a lot can change within a year, and failing to update could mean youre missing new features. With our update subscription, you will get a full years worth of updates (four updates) in order to keep your own DD library and software up to date. Features of our device description library subscription include: Keeping your DD library current with new device descriptions (DDs) Keeping your DD library current with updated/revised DDs Keep you softare current with bug fixes and added features Easy to use web based or in-software updates One years worth of updates (4) Included free with first year warranty