Think software: Once Microsoft (MSFT - news - people) shelled out to develop the code for its Windows operating system, the incremental cost of printing each additional copy was next to nothing.
想想软件：如果微软投入去开发windows操作系统的密码，另外印刷而增加的成本基本为零？
3
When I went with my second brother to Ahmedabad, some enthusiastic friend of mine took me by surprise by printing and publishing it and sending me a copy.