We once published "books" then came "product" and now reading the The [British] Bookseller we can look forward to slots:
"Given the intense competition for slots in publishing houses, successful agents are cherry picking authors and working with them to develop their manuscripts to the highest state
Ivan Mulcahy, director of Mulcahy and Viney
"It's ['On Beauty'] is one of our biggest paperbacks of the year and we have slots in supermarkets."
Joanna Prior, Penguin marketing and publicity director