Is there a pack or packing module in openerp7?

Hi, Is there a module in openerp7 that will facilitate me to add sub-products to a product and sell them. For Ex a product **computer** - Key board - Mouse - CPU - Power Cable - etc where i can also sell the Key board, mouse separately. And with the process of incoming shipment i will not actually receive computer but when i receive all the products like (keyboard, mouse,cpu,power cable,etc) the computer should be available for selling. I am okay for any ideas. Feel free to post your ideas and help me to implement this concept.