σύστημα [systema] is system

It is an airsoft gun that is made by Systema for personal training purposes. These guns are very nice.

AEG? Systema

Elias Magnus Fries has written:

'Systema mycologicum' -- subject(s): Fungi

'Systema mycologicvm' -- subject(s): Fungi

'Observationes mycologicae' -- subject(s): Fungi, Botany

'Systema mycologicum, sistens fungorum ordines, genera et species'

'Epicrisis generis hieraciorum' -- subject(s): Hawkweeds

'Fungi Natalenses' -- subject(s): Fungi

'Summa vegetabilium scandinaviae, seu enumeratio systematica et critica plantarum quum cotyledonearum, tum nemearum inter Mare Occidentale et Album, inter Eidoram et Nordkap, hactenus lectarum, indicata simul distributione geographica' -- subject(s): Plants, Nomenclature

The best place to find videos that demonstrate martial art systema is YouTube. Simply type "martial art systema" in YouTube's search bar, and several pages will come up on that subject.