Conceptronic 4in1 Memory Reader/Writer, Windows operating System or Mac OS 8.5.1 or higher, PCMCIA, Read and write memory stick, smartmedia card, secure digital card (SD) and multimediamemory card... Conceptronic 4in1 Memory Reader/Writer. Compatible operating systems: Windows operating System or Mac OS 8.5.1 or higher. Hardware prerequisites: PCMCIA. I/O ports: Read and write memory stick, smartmedia card, secure digital card (SD) and multimediamemory card...