How can I send stdout to multiple commands?

There are some commands which filter or act on input, and then pass it along as output, I think usually to stdout - but some commands will just take the stdin and do whatever they do with it, and output nothing. I'm most familiar with OS X and so there are two that come to mind immediately are pbcopy and pbpaste- which are means of accessing the system clipboard. Anyhow, I know that if I want to t

[takahiroki]

pipe 以上に複雑なことをやろうと思ったら? A. /dev/fd 系が利用できるなら、 process_substitution が良さげ。それが無理なら、 named pipe (fifo) がよい。