​KembaraXtra-Computer Terms – bit mask:
A bit mask is a special value used in combination with bitwise operations to examine or modify specific bits within a data value. These operations may include logical functions such as AND, OR, XOR, NOT, and similar operators that manipulate bits directly.
By applying a mask, programmers can selectively test, set, or clear particular bits in a binary field without affecting the other bits. This technique is widely used in low-level programming and system operations where precise control over binary data is required.