Abstract: A database system usable in a high user concentration environment includes a central database containing content relating to associated users. Software is configured for loading onto associated portable computers carried by the users. The software when executed on one of the associated portable computers performs a method including: (i) downloading from the central database a selected sub-set of the content before the associated portable computer enters the high user concentration environment; (ii) generating modifications or additions to the downloaded sub-set of the content; and (iii) at least while the associated portable computer is within the high user concentration environment, occasionally wirelessly connecting with the central database to upload at least some of the generated modifications or additions to the central database and to download other modifications or additions to the selected sub-set of content.

Abstract: A method for valuating an advertisement included in a printed advertising circular comprises computing a plurality of scores measuring aspects of the advertisement, and computing a quantitative valuation of the advertisement by computing a weighted aggregation of the scores. At least the computing of the weighted aggregation is performed by a digital processing device. The scores optionally include an advertisement size score. The scores optionally include at least one competition score measuring an aspect of competing advertisements also included in the printed advertising circular. The scores optionally include at least one past history score selected to adjust the quantitative valuation based on past advertising history of a product advertised by the advertisement.