This is the 973rd most frequent Japanese word.
専用
Exclusive use.
In this sentence, "専用" refers to the exclusivity of the room to particular individuals or purposes.
この部屋は専用です。
This room is exclusive to specific use.
Here, "専用" implies that the software is specifically designed and intended for children.
このソフトウェアは子供専用です。
This software is meant exclusively for children.
In this context, "専用" denotes exclusive designation for a particular purpose, which is a parking lot.