W (named double-u, plural double-ues) is the 23rd letter in the modern English alphabet and the ISO basic Latin alphabet.

Backspace is the keyboard key that originally pushed the typewriter carriage one position backwards, and in modern computer systems moves the display cursor one position backwards, deletes the character at that position, and shifts back the text after that position by one position.

The circumflex is a diacritic in the Latin, Greek and Cyrillic scripts that is used in the written forms of many languages and in various romanization and transcription schemes. It received its English name from Latin circumflexus "bent around"a translation of the Greek περισπωμένη (perispōménē). The circumflex in the Latin script is chevron-shaped ( ˆ ), while the Greek circumflex may be displayed either like a tilde ( ˜ ) or like an inverted breve (   ̑ ).

The nasal labio-velar approximant is a type of consonantal sound used in some languages. The symbol in the International Phonetic Alphabet  that represents this sound is , that is, a w with a tilde. The equivalent X-SAMPA symbol is w~.

The W and Z bosons (together known as the weak bosons or, less specifically, the intermediate vector bosons) are the elementary particles that mediate the weak interaction; their symbols are , , and . The W bosons have a positive and negative electric charge of 1 elementary charge respectively and are each other's antiparticles. The Z boson is electrically neutral and is its own antiparticle. The three particles have a spin of 1, and the W bosons have a magnetic moment, while the Z has none. All three of these particles are very short-lived, with a half-life of about . Their discovery was a major success for what is now called the Standard Model of particle physics.

W. can refer to:

• George W. Bush, the 43rd President of the United States
• W. (film), a 2008 film about U.S. President George W. Bush, directed by Oliver Stone
• W. Channel, an Australian television channel tailored towards women

Weezer is an American rock band formed in Los Angeles, California in 1992, currently consisting of Rivers Cuomo (lead vocals, lead guitar), Patrick Wilson (drums), Brian Bell (guitars, backing vocals, keyboards), and Scott Shriner (bass, backing vocals, keyboards). The line-up has changed three times since its formation in 1992. Weezer has sold 9.2 million albums in the US and over 17 million worldwide.