Go2Linux shows you how to suspend to RAM in Slackware or Arch Linux

Suspend to RAM is useful with Laptops and Netbooks, these days batteries last a lot, but anyway not enough if you leave your computer running on batteries while you are not working on it.
Linux distributions like Ubuntu, Peppermint, Mint, Fedora and other alike may have automatic support for this by just closing the lid of the Laptop, Netbook.

  Suspend to RAM Slackware or Arch Linux