Unobservable
Observable
Asynchronous communication
Computer science
Petri net
Stochastic Petri net
Event (particle physics)
Identification (biology)
Sequence (biology)
Discrete event dynamic system
Projection (relational algebra)
Discrete time and continuous time
Algorithm
Discrete system
Mathematics
Econometrics
Statistics
Computer network
Physics
Botany
Genetics
Quantum mechanics
Biology
