电脑没有普及的时代，想要跟外面世界的人交流不是很容易，很多人都通过笔友来认识外面的世界。到了现在，无论你身处何地，只要有互联网，你就可以了解世界。当然，笔友这个传统还是被保留了下来，不过沟通媒介发生了变化。 Pen pals (or penpals or pen friends ...

CANTON, Ohio, Dec. 6, 2017 /PRNewswire/ -- Described as a "nearly invisible way to hang your things," KeyPal is the perfect solution for anyone who loses track of things they take with them every day ...