BIN

This operation puts the calculator in binary mode. Integer values are displayed in base 2. The integer 100 binary will be shown as "# 100b". The "#" at the start indicates that the number is an integer and the trailing "b" indicates the number is displayed in binary mode.

When entering integers, the final character normally indicates what base to use when reading that value. The characters are d for decimal, h for hexadecimal, o for octal and b for binary. Omitting that character in binary mode will result in the calculator assuming the value should be interpreted as a binary value.