Just the computer for the MM trading, or creating the appearance of trading and getting off odd lots.....

Definition of 'Odd Lot'

An order amount for a security that is less than the normal unit of trading for that particular asset. Odd lots are considered to be anything less than the standard 100 shares for stocks. Trading commissions for odd lots are generally higher on a percentage basis than those for standard lots, since most brokerage firms have a fixed minimum commission level for undertaking such transactions.