This is the 2115th most frequent Russian word.
система
System.
In this context, 'система' refers to a structured set of components that function together as a computer system.
Компьютерная система нуждается в обновлении.
The computer system requires an update.
Here, 'система' describes an organized method or approach, specifically for education.
В нашей школе внедрена новая система обучения.
A new education system has been implemented in our school.
In this usage, 'система' indicates a collection of interconnected elements functioning together, in this case, solar panels.