Due to the near-opposite meanings [of "open" and "close"] relating to fluid flow and electrical components, these usages are deprecated in safety-critical instructions, with the words to on or to off preferred, so instead of Open valve A; open switch B" use Turn valve A to ON; turn switch B to OFF.#TIL
but yeah, it's dumb how these ae so similar, i mean both make sense in their context but 💀