The best replacement for os is od.

The best alternatives to os are rated as following:
★★★★★  od
★★★★  windows
★★★  windows mobile
★★  android
★  pocket pc
★  ios
★  windows 8
★  oes
★  kernel
★  od eyes
★  64 bit os
★  vo
★  firmware
★  linux os
★  linux
★  jolicloud
★  harvey maps
  vos
  ns
  windows 7
  32 bit os
  rtos
  platform
  windows xp
  od contacts
  ou
  nos
  conus
  windows os
  o2
  windows ce
  one size
  iphone os
  od eye
  ubuntu
  windows mobile os
  os shell
  thunder tiger
  windows vista
  symbian
  oc
  novarossi
  operating system
  vr
  microsoft os
  ys

Your alternative for os is not listed? Suggest!
Speaking about os, one probably shouldn't forget about hard disk.

Other search terms related to os and their ratings are:
★★★★★ hard disk
★★★ computer
★★★ java
★★ formatting
★★ pc
★ assembly
★ flash drive
xbmc
You have in mind a companion for os and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of os in all years. Click on graph for more.
os
od
windows