PC Outline.  It&#x27;s a DOS-based outliner.  In 1986, my manager said &quot;Here, you&#x27;re organised.  You&#x27;ll like this&quot; and he was right - I did.  So much so that I bought my own copy.  I still use it every day in a DOSBox DOS emulator on Windows 7 and Linux.  I use it for passwords, todo and done lists, keeping track of work done for clients, functional decomposition, shopping lists and the steps for configuring and compiling the Linux kernel.