This specialized material, formed into the Quintet's speaker cabinets with non-parallel walls to diminish internal standing waves, is truly the next generation in compact home speaker technology.

ENGADGET: Klipsch refreshes Quintet home theater system HD

Behind the deep aluminum accents, the unique curvature of the unit goes beyond aesthetics with non-parallel walls that prevent the cross-cancellation of sound waves and produces more natural sound.

ENGADGET: Altec Lansing Live 5000 WiFi music system makes its debut, plays nice with Android and iOS (ears-on)

Westminster Hall - the Commons parallel debating chamber, where non-party controversial issues are aired - sees two debates on veterans' issues.

BBC: Viewing guide: The pick of the week ahead in Parliament

The rules against non-lawyers investing in the business of law parallel similar restrictions on doctors, which were designed to make sure physicians answered only to their patients.

FORBES: North Carolina Bill Would Let Non-Lawyers Invest In Law Firms

The festival has no parallel in southern Europe, but it's Christmas's non-identical twin: it holds a special place in the national psyche with its own customs, memories and social pressure.

BBC: Here comes the sun in Sweden

Ross and his colleagues offered parallel columns of upper-class (U) speech versus the speech of (non-U) middle-class people trying to attain, or pretend to, upper-class status.

NEWYORKER: The English Wars