Mark Otto and Jacob Thornton developed Bootstrap at Twitter as a means of improving the consistency of tools used on the site and reducing maintenance. The software was formerly known as Twitter Blueprint and is sometimes referred to as Twitter Bootstrap.
The Mario brothers were first seen in 1983 in the arcade game Mario Bros. Mario was invented before Luigi and first showed up in the game Donkey Kong in 1981.
Two of the original Nintendo Entertainment System Mario games have been ported to Wii U and altered to feature Luigi as the protagonist. Luigi was first introduced in the 1983 arcade game Mario Bros., where he and Mario battle pests on a single screen. The first game to star Luigi was the 1992 game Mario is Missing. The first game to use the Luigi branding is the 2001 game Luigi's Mansion, which introduces the haunted theme that is used in many of Luigi's following appearances.