Square nF

Nanofarad: the nF unit of capacitance. The square form fits the Latin abbreviation into one character position.

Square unit forms preserve a convention from legacy East Asian character sets: compact Latin abbreviations fit into one character position. South Korea's KS X 1001 lists ㎋ alongside the square signs for picofarad and microfarad.

South Korea's KS X 1001 standard began in 1974; its two-byte character encoding, which stores each character as two units of digital data, took shape in 1986–1987. Unicode compatibility normalization can expand ㎋ to nF without changing the unit.