Does NASA use helium?

Could you please clarify for me whether NASA incorporates the use of helium in its operations? I'm particularly interested in understanding the specific applications, if any, where helium might play a crucial role. Would helium be utilized in spacecraft propulsion systems, for instance, or perhaps in maintaining the integrity of equipment and instruments in the harsh environments of space? I'm also wondering if helium is involved in any experiments or research conducted by NASA. Thank you for your assistance in addressing my curiosity.