Abstract: The portable memory module disclosed herein is constructed in a compact cylindrical form facilitating its use in oceanographic and environmental data acquisition environments. Individual integrated circuit memory components are carried and interconnected by a flexible printed circuit, the components being oriented in columns with pin lines parallel to the axis of a cylindrical battery casing to permit the circuit to be rolled around that casing. The battery casing and rolled printed circuit are then inserted in a protective outer casing, also cylindrical.