0 a set of programs that control the way a computer system works, especially how its memory is used and how different programs work together --
1 the set of programs that a computer uses to operate, store files, and communicate with devices and other computers --
2 a program that controls the way a computer works, and that allows applications (= programs for particular purposes) to work on it: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.