Advanced level of CSS skills.

U.S. cryptologic intelligence security agencies.

CSS Flexible Box Layout, commonly known as Flexbox, is a CSS web layout model.

the first steam-powered ironclad warship built by the Confederate States Navy during the first year of the American Civil War; she was constructed as a casemate ironclad using the razéed (cut down) original lower hull and engines of the scuttled steam frigate .

In Cascading Style Sheets, CSS grid layout or CSS grid creates complex responsive web design grid layouts more easily and consistently across browsers.

a proposed module for Cascading Style Sheets that allows the animation of HTML document elements using CSS.

A CSS framework is a library allowing for easier, more standards-compliant web design using the Cascading Style Sheets language.

a screw sloop-of-war built in 1862 for the Confederate States Navy.

CSS Shenandoah, formerly Sea King and later El Majidi, was an iron-framed, teak-planked, full-rigged sailing ship with auxiliary steam power chiefly known for her actions under Lieutenant Commander James Waddell as part of the Confederate States Navy during the American Civil War.

In web development, the CSS box model refers to how HTML elements are modeled in browser engines and how the dimensions of those HTML elements are derived from CSS properties.

In quantum error correction, CSS codes, named after their inventors, Robert Calderbank, Peter Shor

a World Wide Web development resource "built to demonstrate what can be accomplished visually through CSS-based design."

CSS Manassas, formerly the steam icebreaker Enoch Train, was built in 1855 by James O. Curtis as a twin-screw towboat at Medford, Massachusetts.

CSS Industries, Inc., was founded in 1923, as City Stores Company.