The $25 Model A sacrifices the ethernet port and has only one USB port. Thus, the model A needs much lesser power than the Model B.

While some might argue that this defeats the purpose of buying a Pi in the first place, as it requires a PC to program on, others see this as an important step in overcoming a learning curve. We cannot ignore the fact that this will not work towards making the Raspberry Pi more accessible to the poor.

After a wait period of six years, the response was so overwhelming that the Raspberry Pi website crashed under heavy load. They came back with an announcement but by then, they had sold out too.