Penny's OS (S 19)

 
or SaaS or Sabayon Linux
or Sabily or SABRE
or Sacix or Sage
or Saguaro or Salgix
or Salix OS or Salvare
or Salvo or SAM
or Samhain Linux or Sanos
or Santa Fe or The Sapphire Project
or Sartoris Microkernel or SauverOs
or SAX or ScaraOS
or Scientific Linux or Scientific Linux Fermi
or SCI.Linux or SCIOPTA RTOS
or SCO Open Desktop or SCO OpenServer
or SCOPE or ScorchOS
or Scos or ScottsNewOS
or SCO UNIX or SCO Unixware
or SCO XENIX or Scout
or SCP or SCP-DOS
or SCP-IBE or SCP-1700
or ScreenOS or ScrudgeWare
or SDOS or SDPOS
or SECCOS or Securepoint Os
or SEL 810A/810B OS or Sendla OS
or Sentry Firewall or SeOS
or Sequent or SHARE
or ShareNet or S.Ha.R.K.
or SharpOS or ShawnOS
or Shift Linux or Shinux
or SHR or SIBO
or sidux or SIGMA 7 OS
or SilveOS or SimpleAVROS
or Simplis or SimplyMEPIS
or Sinclair QDOS or Singularity
or SINIX or SINTRAN
or SIPROS or Sirius RTOS
or 64 Studio or Skolelinux
or SkyOS or Slack/390
or Slackintosh or Slackware
or Slamd64 or SLAMPP
or Slavix or Slax
or Slikware or SliTaz
or Slix or Slo-Tech Linux
or SLS or SLYNUX GNU
or Smallfoot or SmartDOS
or SME Server or SmoothWall
or SMP or SMS
or sMultiTA or $murf oS
or SNAPPIX or Snøfrix
or SOBS or SODA
or SODS/OS or SOFriki
or Softlanding or Solaris
or Solar_OS or Solbourne UNIX
or SOLO or Sombrero
or SONaFR or S1
or SOOS or Sorcerer
or SORIX or SOS
or SOT Linux or Source Mage
or SOX or Soyombo
or SPACE or SPART
or SpartaDOS or Spectra Linux
or SPEEDOS or SPHERE
or SphinxOS or Spice
or Spice/MT or SPIN
or Spinix or SPIX
or Splack or Splashtop
or The Spoon Microkernel or SPOX
or SPP-UX or Spri
or Spring or Sprite
or SP6800 or SQOS
or SqueakNOS or SSB-DOS
or SSP or SSS-PC
or Stable Hybrid Release or Stampede
or STARCOS or StarOS
or STARPLEX II or STARSYS
or Start.com or Static OS
or STD or Stellix
or Sting or STOP
or Stonegate or Storm Linux
or STRATUS or Stratus VOS
or StreamBOX or StreamOS
or StressLinux or Stupid
or STUX or STX
or Subsumpt or SUE
or Sugar on a Stick or Sumo
or SUN or SUNIX
or SUNMOS or SunOS
or Sun Linux or SunriseOS
or Sun Solaris or Sunwah Linux
or SuperDOS or SuperGamer
or Super OS or Super ubuntu
or SUPER-UX or SuSe
or SVM or SVR
or SVS or SyCODE Platform
or Syllable Desktop or Symbian OS
or Symbian Platform or Symbolics Genera
or SymbOS or Symobi
or Symphony OS or Synapse
or Synthesis or Synthetix
or SYSEX or SysPak OS
or System B or System 1
or SystemRescueCD or System 6
or System 2 or System V