Damn Small is small enough and smart enough to do the following things:
Boot from a business card CD as a live linux distribution (LiveCD)
Boot from a USB pen drive
Boot from within a host operating system (that's right, it can run *inside* Windows)
Run very nicely from an IDE Compact Flash drive via a method we call "frugal install"
Transform into a Debian OS with a traditional hard drive install
Run light enough to power a 486DX with 16MB of Ram
Run fully in RAM with as little as 128MB (you will be amazed at how fast your computer can be!)
Modularly grow -- DSL is highly extendable without the need to customize

Change Log for DSL v4.0rc4

* New dfmext.lua GUI tool for dfm associations
* New automatic update of etc.ld.cache for uci .so files
* Updated torsmo v0.18
* Updated functions5.lua
* Updated DSLpanel Backgrounds calls dfm background option
* Update mydslDownload.lua
* Added emelfm to jwm taskbar
* Removed obsolete and unused files and directories