si

International System of Units

The reason for the change to the International System of Measurement (SI) units was that over time the prototype lost atoms and therefore mass because it is “susceptible to damage and environmental factors,” according to the National Physical Laboratory (NPL), which houses Kilo 18, Britain’s copy of Le Grand K.

Initialism of Smithsonian Institution.

Initialism of Sports Illustrated.

“We have said from the start that our top priorities are to keep Sports Illustrated alive, uphold the legacy of the institution and protect our union jobs. We look forward to discussing a future with Minute Media that does that,” Emma Baccellieri, staff writer for SI and vice chair for the SI Union, said in a statement.

Initialism of signal integrity.

Initialism of systems integration.

Initialism of self-injury.

Initialism of suicidal ideation.

Initialism of self-insertion (of the author into fan fiction).