There is no analog I/O on the Raspberry Pi. You can do PWM output on a pin, but otherwise no analog input or output. There really isn't much to drop from the

There is no analog I/O on the Raspberry Pi. You can do PWM output on a pin, but otherwise no analog input or output. There really isn't much to drop from the model A--it's just the processor and supporting passive components with some headers, connectors, etc. edit: I guess you could drop the analog video and sound output, but that would probably just save a few cents for the connectors.