Retuinskih System ROSS (; English transliteration: Rossiyskaya Otechestvennaya Sistema Samozashchity; translated as Russian Native System of Self-Defense) is a martial system trademarked by Alexander Retuinskih related to Systema. ROSS is its official name given by the All-Russian Federation of Russian Martial Arts (RFRMA). It is conceived more as a methodology of performance enhancement for combat, applicable to any martial art, rather than a closed system.

Ross (Ros in Scottish Gaelic) is a region of Scotland and a former earldom and county. The name Ross allegedly derives from a Gaelic word meaning "headland", perhaps a reference to the Black Isle. Another possible origin is the West Norse word for Orkney – Hrossey – meaning horse island; the area once belonged to the Norwegian (West Norse) earldom of Orkney. Ross is a historical comital region, perhaps predating the Mormaerdom of Ross.

Ross-shire is a historic county in the Scottish Highlands. The county borders Sutherland, Cromartyshire (of which it contains many exclaves), Inverness-shire and an exclave of Nairnshire. It includes most of Ross as well as Lewis in the Outer Hebrides. Dingwall is the traditional county town.

South Sudan , officially the Republic of South Sudan, is a landlocked country in northeastern Africa that gained its independence from Sudan in 2011. Its current capital is Juba, which is also its largest city. It is planned that the capital city will be changed to the more centrally located Ramciel in the future. South Sudan is bordered by Sudan to the north, Ethiopia to the east, Kenya to the southeast, Uganda to the south, the Democratic Republic of the Congo to the southwest, and the Central African Republic to the west. It includes the vast swamp region of the Sudd, formed by the White Nile and known locally as the Bahr al Jabal.