• Astrological compatibility
  Astrological compatibility
  Astrological compatibility is the branch of astrology that studies relationships by comparing natal horoscopes. A natal horoscope is a chart, map, or imaginary snapshot of the planets in the Solar System and their positions in the zodiac at the exact time of a person's birth. The signs of the...
  
  
• Compatibilism
  Compatibilism
  Compatibilism is the belief that free will and determinism are compatible ideas, and that it is possible to believe both without being logically inconsistent. It may, however, be more accurate to say that compatibilists define 'free will' in a way that allows it to co-exist with determinism...
  
   – a philosophical position
• Compatibility (geochemistry)
  Compatibility (geochemistry)
  In geochemistry, compatibility is a measure of how readily a particular trace element substitutes for a major element within a mineral.Compatibility of an ion is controlled by two things: its valence and its ionic radius. Both must approximate those of the major element for the trace element to be...
  
  
• Compatibility (chemical)
  Compatibility (chemical)
  Chemical compatibility is a measure of how stable a substance is when mixed with another substance. If substances mix and do not change they are considered compatible. If substances mix and change or do not mix at all they are considered incompatible....
  
  
• Compatibility (mechanics)
  Compatibility (mechanics)
  In continuum mechanics, a compatible deformation tensor field in a body is that unique field that is obtained when the body is subjected to a continuous, single-valued, displacement field. Compatibility is the study of the conditions under which such a displacement field can be guaranteed...
  
  
• Electromagnetic compatibility
  Electromagnetic compatibility
  Electromagnetic compatibility is the branch of electrical sciences which studies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects that such energy may induce...
  
  
• Interpersonal compatibility
  Interpersonal compatibility
  Interpersonal compatibility is a concept that describes the long-term interaction between two or more individuals in terms of the ease and comfort of communication.-Existing concepts:...
  
  

Computing

• Pin-compatibility
  Pin-compatibility
  In electronics, a pin-compatible device, such as a logic integrated circuit , memory module or microprocessor, is one that has the same functions assigned to the same particular pins....
  
  
• Computer compatibility
  Computer compatibility
  A family of computer models is said to be compatible if certain software that runs on one of the models can also be run on all other models of the family. The computer models may differ in performance, reliability or some other characteristic...
  
  , of a line of machines
• License compatibility
  License compatibility
  License compatibility refers to the problem with licenses applied to works subject to copyright, particularly licenses of software packages, which can contain contradictory requirements, rendering it impossible to combine source code from such packages or content from such works in order to create...
  
  , of software license
• Backward compatibility
  Backward compatibility
  In the context of telecommunications and computing, a device or technology is said to be backward or downward compatible if it can work with input generated by an older device...
  
  , newer devices can understand the input generate for older devices
• Forward compatibility
  Forward compatibility
  Forward compatibility or upward compatibility is a compatibility concept for systems design, as e.g. backward compatibility. Forward compatibility aims at the ability of a design to gracefully accept input intended for later versions of itself...
  
  , older devices partly can understand data generated by newer devices
• Compatibility layer
  Compatibility layer
  A compatibility layer is a term that refers to components that allow for non-native support of components.In software engineering, a compatibility layer allows binaries for a legacy or foreign system to run on a host system. This translates system calls for the foreign system into native system...
  
  , a components that allow for non-native support of components
  • Compatibility mode
    Compatibility mode
    A compatibility mode is a software mechanism in which a computer's operating system emulates an older processor, operating system, and/or hardware platform in order to allow obsolete software to remain compatible with the computer's newer hardware or software....
    
    
• Compatibility card
  Compatibility card
  A compatibility card is an expansion card for computers that allows it to have hardware emulation with another device. The most popular of these were for Macintosh systems that allowed them to emulate Windows PCs via NuBus or PCI. Apple Computer made many of these cards A compatibility card is an...
  
  , an expansion card for hardware emulation of another device