NOVELTY - A hydrogen production system comprises a mixed reforming zone (84) to receive a first fuel (144) steam mixture and an oxidant (146) to produce a first reformate stream comprising hydrogen, and steam reforming zone(s) (86) to receive the first reformate stream, a first portion of steam (130) and a second fuel (142) to produce a second reformate stream comprising hydrogen. The first reformate stream is mixed with the first portion of steam and second fuel before entering the steam reforming zone.    USE - The system is used for producing hydrogen from different hydrocarbon fuels such as natural gas, gasoline, diesel, and alcohols such as methanol and ethanol. The hydrogen can be used as fuel for vehicles and stationary power (electric utility).    ADVANTAGE - The hydrogen production system is compact. It recovers excess heat from the off-gas efficiently, allowing the efficiency of overall process to be improved over conventional hydrogen production processes. The system design provides the possibility of optimizing the catalyst for each individual reaction such as CPO or steam methane reforming (SMR), and uses the catalyst best suitable for each reaction. The amount of steam introduced into the two zones can also be optimized for the best yield.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for production of gas stream comprising hydrogen, by partially oxidizing a first fuel and an oxidant in a catalytic partial oxidation (CPO) zone or in an auto-thermal reforming (ATR) zone to produce a first reformate stream comprising hydrogen, mixing the first reformate stream with a second fuel and steam to produce a mixed stream, and steam reforming the mixed stream in a steam-reforming zone to produce a second reformate stream comprising hydrogen.    DESCRIPTION OF DRAWING(S) - The figure illustrates a hydrogen production system.    Vessel (82)    Mixed reforming zone (84)    Steam reforming zone (86)    Steam (130)    Second fuel (142)    First fuel (144)    Oxidant (146)    Heat exchange zone (153)