User:George Church/sandbox

{{short description|Testing environment for software development}yes}}

Sandbox (software development)

A sandbox is a testing environment that isolates untested code changes and outright experimentation from the production environment or repository, in the context of software development including Web development and revision control.

Vaccine Compositions

 * CCID50= cell culture infective dose at 50%; IU= international units; Lf= Limits of Flocculation (1:1 toxin:anttoxin); Inf.U= Infectious units

The classes of the stars and brown dwarfs are shown in the color of their spectral types (these colors are derived from conventional names for the spectral types and do not represent the star's observed color). Many brown dwarfs are not listed by visual magnitude but are listed by near-infrared J band apparent magnitude due to how dim (and often invisible) they are in visible color bands (U, B or V). Absolute magnitude (with electromagnetic wave, 'light' band denoted in subscript) is a measurement at a 10-parsec distance across imaginary empty space devoid of all its sparse dust and gas. Some of the parallaxes and resultant distances are rough measurements.