Kernel

jajko

((computing) central part of many computer operating systems)

jądro

((computing) central part of many computer operating systems)

jądro

((mathematics, algebra) set of elements mapped to zero)

pestka

((US) stone of certain fruits, such as peaches or plums)

rdzeń

(core or essence of an object or system)

sedno

(core or essence of an object or system)

trzon

(core or essence of an object or system)

ziarno

(single seed of corn or wheat)