Abstract: The electronic device (21) for receiving product-related data comprises a memory (23) for storing a unique product identifier identifying a product selected from a database, a wireless transmitter (25), a wireless receiver (27) and a processor (29). The processor (29) performs a method comprising the steps of wirelessly transmitting a unique product identifier to be received by a nearby electronic device, the unique product identifier identifying a product selected from a database, and wirelessly receiving data related to said product from the nearby electronic device. The electronic device (31) for transmitting product-related data comprises a storage means (33) for storing a unique product identifier and data associated with the unique product identifier, a wireless transmitter (35), a wireless receiver (37) and a processor (39).

Abstract: Portable devices are usually synchronized with servers like personal computers. Furthermore, most portable devices provide a user with the possibility to generate data objects or to obtain data objects from other sources than the personal computer. This means that of certain data objects a backup exists, as they are stored on the personal computer. Other data objects are unique, as the user does not have a backup at his or her disposal. Energy is a precious commodity in portable devices. A memory, in particular a volatile memory, consumes power. In case energy is required for keeping data objects stored, of which no backup is at the disposal of the user, but this energy might not be available in the future due to battery level, storage of data objects of which a backup exists is sacrificed for the benefit of storage of data objects for which there is no backup.

Abstract: The invention relates to a recording medium (2), particularly an optical recording disk, which comprises at least one record track (3) having a physical volume (32) with addressable blocks (4). The physical volume (32) is divided into spare area (36;38) and user-accessible logical volume (37). A single spare area (36) is only located at the beginning of the physical volume (32), or a single spare area (38) is only located at the end of the physical volume (32). Alternatively, a first spare area (36) is located at the beginning of the physical volume (32) and a second spare area (38) is located at the end of the physical volume (32). Thus, the logical volume (37) is physically contiguous, that is, not interrupted by any spare area The recording medium according to the invention can be used both for storing computer data as well as for recording audio and/or video information. The invention also relates to methods and a device for use in conjunction with the recording medium.