Abstract: A method for item collection in a shop in participation of a shopper and in support of computerized platforms. The method includes providing first and second shopping lists, supporting item collection by the shopper in accordance with the lists. The method may include providing an user interface to an item database and storage for shopping lists, facilitating division of a single shopping list into first and second shopping lists, comparing a shopping list with available items, and storing past shopping list. The shop may propose the.shopper buy an available item, encourage sale of the available item in replacement of an unavailable item, remind items based on past shopping lists and support a promotion campaign for the item. The shop may compose a suggestive shopping list, provide the shopping list on a hard copy or mobile device, and may provide the shopper data associated with item locations.