Abstract: In one example, our mobile application and system provide users with a way to sell/buy books to and from those around them. Users would first create an account linked to their .edu email address. Using a third party payment program, the user then links their payment information. This allows for the transfer of money safely with the security of this third party company. When a student or any other user wants to sell their book, they log into their account and can then enter their course number, book title, description of condition, and selling price. This can be automated by simply taking a picture of the ISBN or bar code, and it automatically populates the fields, allowing the student to change the price and condition. Other variations are also shown in the specification.

Abstract: In one example, we describe a method and system which consist of a small rubber attachment which can be slipped onto the chest piece of any stethoscope. We show designs, configurations, and descriptions of different finger guard designs. This reduces drastically or eliminates completely the background sound picked up from the fingers of the user/physician, which may interfere with diagnosing the physiologic sound picked up from the patient. In one example, we describe a method and system for Stethoscope Attachment, Auscultation Device. The device is a small attachment which can fit to any stethoscope. It connects between the removable chest-piece and tubing. The device houses a computer and sensor (e.g., membrane) which can receive incoming sound waves and analyze, or compare them to stored waveforms to categorize and analyze the incoming sound, to diagnose or recognize or classify the auscultated sound. Other variations are also shown.