Abstract: A body-worn device configured in size and shape to be worn by a user, the body-worn device comprising a tactile feedback actuator configured to supply tactile feedback to the user, wherein said tactile feedback actuator configured to supply the feedback based on instructions provided via a communication channel. Optionally, the body-worn device is configured in size and shape to be worn around a torso of the user. Optionally, the tactile feedback actuator is configured to supply the tactile feedback to a back and/or a chest of the user. Optionally, wherein said body-worn device comprises a first and a second tactile feedback actuators, wherein the first tactile feedback actuator is positioned to be in proximity to a chest of the user, and wherein the second tactile feedback actuator is positioned to be in proximity to a back of the user.

Abstract: A method, apparatus and product for providing instructions associated with music. The apparatus includes an instruction generating component for generating one or more instructions associated with one or more features within the music. The apparatus also includes an instruction delivery component attached to or worn by a user for delivering the instructions to the user.

Abstract: Each copy of software is assigned a unique identifying code pattern which is printed on all documents produced with that software by a high resolution printer. The unique identifying code pattern is a plurality of spaced apart marks having a size no greater than about 300 dpi, and is therefore, at best, barely noticeable to the human observer. The "invisible signature" is also reproduced on documents made by unauthorized copies of software which can therefore be traced. Preferably, the unique identifying code is replicated multiple times over the document using an error correcting code to assure that at least one replication will be clear of matter selected for printing by the software. A high resolution scanner extracts and identifies the code patterns printed on the document.