To be considered as open source software by the software development industry, certain criteria must be met: The program must be freely distributed (It can be part of a package that is sold though, such as Red Hat has done with Linux in the example below).
The term broad-spectrum antibiotic refers to an antibiotic that acts against a wide range of disease-causing bacteria. A broad-spectrum antibiotic acts against both Gram-positive and Gram-negative bacteria, in contrast to a narrow-spectrum antibiotic, which is effective against specific families of bacteria. An example of a commonly used broad-spectrum antibiotic is ampicillin.
Plural spectra (spÄk'trÉ) or spectrums. 1  A range over which some measurable property of a physical phenomenon, such as the frequency of sound or electromagnetic radiation, or the mass of specific kinds of particles, can vary. 2  The observed distribution of a phenomenon across a range of measurement.