** Scheduling and budgeting without reference to reality

** A ground bus or earth bus is a conductor used as a zero voltage reference in a system, often connected to ground or earth.

** Orbital node, the points where an orbit crosses a plane of reference

** Epochal date or event, see epoch ( reference date )

** Epochal moment, in astronomy, a reference for the orbital elements of a celestial body

** Origin ( mathematics ), a fixed point of reference for the geometry of the surrounding space

** Anything which is recorded in writing or otherwise for future reference

** Xiph reference implementation

** U. S. President Herbert Hoover is succeeded by Franklin D. Roosevelt ( FDR ), who in reference to the Great Depression, proclaims " The only thing we have to fear, is fear itself " in his inauguration speech.

** The earliest reference to the publishing of private newspapers in Beijing.

** An anaphoric reference, when opposed to cataphora, refers to something within a text that has been previously identified.

** A cataphoric reference refers to something within a text that has not yet been identified.

** an adherent of Gaianism — an Earth-centered ( sometimes referred to as neo-Pagan ) spiritual inclination with diverse and evolving religious expression whose central reference is Gaia as personification of the Earth as Mother to all life upon the planet.

** North-south reference roads have numbers 5-95 terminating in the figure 5, or odd 101-129, and increasing from west to east.

** East-west reference roads have two-digit numbers terminating in the figure 0 and increasing from north to south.

** a reference to Moses the Levite ( I Chr.

** puff. c ( zlib ), a small, unencumbered, single-file reference implementation included in the / contrib / puff directory of the zlib distribution.

** When the policeman enters Chronotis ' room, the Doctor can be heard talking about a " terrible way to see in the New Year " in a possible reference to that Doctor's first adventure.

** Tivoli Gardens, an amusement park in Copenhagen, named in reference to the Parisian garden

** Tivoli, Ljubljana, a garden and a park in Slovenia, also named in reference to the Parisian garden

** Ana Ng mentions the line " All alone at the Sixty-Four World's Fair / Eighty dolls yelling ' Small Girl After All '", a direct reference to the fair and the " It's a small world " attraction.

** A temporary marker buoy set by danlayers during minesweeping operations to indicate the boundaries of swept paths, swept areas, known hazards, and other locations or reference points.

** Before the reading or chanting of the Gospel, the priest prays: " Cleanse my heart and my lips, O almighty God, who didst cleanse the lips of the prophet Isaias ...", a reference to Isaiah 6: 6.

** the censorship of any reference ( of its name ) on Mathias Poujol-Rost ′ s weblog,

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** If the set A is infinite, then there exists an injection from the natural numbers N to A ( see Dedekind infinite ).

** Every infinite game in which is a Borel subset of Baire space is determined.

** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.

** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.

** The Nielsen – Schreier theorem, that every subgroup of a free group is free.