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ERD Symbols and Meanings

Crow's foot notation is used in Barker's Notation, Structured Systems Analysis and Design Method (SSADM) and information engineering. Crow's foot diagrams represent entities as boxes, and relationships as lines between the boxes. Different shapes at the ends of these lines represent the cardinality of the relationship.
The Chen's ERD notation is still used and is considered to present a more detailed way of representing entities and relationships.
To create an ERD, software engineers mainly turn to dedicated drawing software, which contain the full notation resources for their specific database design - ERD symbols and meanings. CS Odessa has released an all-inclusive Entity-Relationship Diagram (ERD) solution for their powerful drawing program, ConceptDraw DIAGRAM.
How to Build an Entity Relationship Diagram (ERD)
How to Build an Entity Relationship Diagram (ERD)

Chemistry Symbols and Meanings

Chemistry solution offers 5 libraries with large collection of vector chemistry symbols and meanings, chemistry equation symbols, organic chemistry symbols, and chemical clipart: Chemical Elements Library, Chemical Drawings Library, Conformations Library, Laboratory Equipment Library, Periodic Table of Chemical Elements Library.

Network diagrams with ConceptDraw DIAGRAM

Network diagram is the tool for description, study and analysis of network knots and connections between these knots. Created network diagram can present you the existing information in comprehensible graphic view.
Network diagrams are divided into Physical Network Diagrams and Logical Network Diagrams.
Network diagram is an indispensable tool for network administrators and engineers at development of new networks and management of existing networks.

Organic Chemistry Symbols

ConceptDraw DIAGRAM diagramming and vector drawing software extended with Chemistry solution from the Science and Education area of ConceptDraw Solution Park is effective for drawing various organic chemistry schemes, diagrams, illustrations thanks to the included collection of predesigned organic chemistry symbols.
This vector stencils library contains 30 clipart images and astronomical symbols of sun and stars, solar system planets and moon.
Use these shapes for drawing your astronomical diagrams and illustrations.
Solar system
Solar system, Solar system,
Sun
Sun, Sun,
Mercury
Mercury, Mercury,
Venus
Venus, Venus,
Earth
Earth, Earth,
Moon
Moon, Moon,
Mars
Mars, Mars,
Jupiter
Jupiter, Jupiter,
Saturn
Saturn, Saturn,
Uranus
Uranus, Uranus,
Neptune
Neptune, Neptune,
Pluto
Pluto, Pluto,
Red giant
Red giant , red giant,
Yellow giant
Yellow giant , yellow giant,
Blue giant
Blue giant, blue giant,
Red dwarf
Red dwarf , red dwarf,
White dwarf
White dwarf, white dwarf,
Black hole
Black hole,
Planets to scale
Planets to scale, planets,
Sun symbol
Sun symbol, Sun symbol,
Mercury symbol
Mercury symbol, Mercury symbol,
Venus symbol
Venus symbol, Venus symbol,
Earth symbol
Earth symbol, Earth symbol,
Moon symbol
Moon symbol, Moon symbol,
Mars symbol
Mars symbol, Mars symbol,
Jupiter symbol
Jupiter symbol, Jupiter symbol,
Saturn symbol
Saturn symbol, Saturn symbol,
Neptune symbol
Neptune symbol, Neptune symbol,
Uranus symbol
Uranus symbol, Uranus symbol,
Pluto symbol
Pluto symbol, Pluto symbol,
The vector stencils library "Chemical elements" contains 118 icon symbols of chemical elements for drawing atoms, structural formulas and ball-and-stick models of inorganic and organic molecules and ions, and schemes of chemical reaction mechanisms.
"In chemistry, the ball-and-stick model is a molecular model of a chemical substance which is to display both the three-dimensional position of the atoms and the bonds between them. The atoms are typically represented by spheres, connected by rods which represent the bonds. Double and triple bonds are usually represented by two or three curved rods, respectively. In a good model, the angles between the rods should be the same as the angles between the bonds, and the distances between the centers of the spheres should be proportional to the distances between the corresponding atomic nuclei. The chemical element of each atom is often indicated by the sphere's color." [Ball-and-stick model. Wikipedia]
The chemical symbols example "Design elements - Chemical elements" was created using the ConceptDraw PRO software extended with the Chemistry solution from the Science and Education area of ConceptDraw Solution Park.
Chemical element icons
Chemical element icons, zirconium, Zr, zinc, Zn, yttrium, Y, ytterbium, Yb, xenon, Xe, vanadium, V, uranium, U, ununtrium, Uut, ununseptium, Uus, ununquadium, Uuq, ununpentium, Uup, ununoctium, Uuo, ununhexium, Uuh, ununbium, Uub, tungsten, W, titanium, Ti, tin, Sn, thulium, Tm, thorium, Th, thallium, Tl, terbium, Tb, tellurium, Te, technetium, Tc, tantalum, Ta, sulfur, S, strontium, Sr, sodium, Na, silver, Ag, silicon, Si, selenium, Se, seaborgium, Sg, scandium, Sc, samarium, Sm, rutherfordium, Rf, ruthenium, Ru, rubidium, Rb, roentgenium, Rg, rhodium, Rh, rhenium, Re, radon, Rn, radium, Ra, protactinium, Pa, promethium, Pm, praseodymium, Pr, potassium, K, polonium, Po, plutonium, Pu, platinum, Pt, phosphorus, P, palladium, Pd, oxygen, O, osmium, Os, nobelium, No, nitrogen, N, niobium, Nb, nickel, Ni, neptunium, Np, neon, Ne, neodymium, Nd, molybdenum, Mo, mercury, Hg, mendelenium, Md, meitnerium, Mt, manganese, Mn, magnesium, Mg, lutetium, Lu, lithium, Li, lead, Pb, lawrencium, Lr, lanthanum, La, krypton, Kr, iron, Fe, iridium, Ir, iodine, I, indium, In, hydrogen, holmium, Ho, helium, He, hassium, Hs, hafnium, Hf, gold, Au, germanium, Ge, gallium, Ga, gadolinium, Gd, francium, Fr, fluorine, F, fermium, Fm, europium, Eu, erbium, Er, einsteinium, Es, dysprosium, Dy, dubnium, Db, darmstadtium, Ds, curium, Cm, copper, Cu, cobalt, Co, chromium, Cr, chlorine, Cl, cerium, Ce, carbon, C, californium, Cf, calcium, Ca, caesium, Cs, cadmium, Cd, bromine, Br, boron, B, bohrium, Bh, bismuth, Bi, berylium, Be, berkelium, Bk, barium, Ba, astatine, At, arsenic, As, argon, Ar, antimony, Sb, americium, Am, aluminium,Al, actinium, Ac,
The vector stencils library "Periodic table of chemical elements" contains 119 icon symbols of chemical elements for drawing Mendeleev's periodic table, chemical diagrams, infographics and illustrations.
"A chemical element is a pure chemical substance consisting of a single type of atom distinguished by its atomic number, which is the number of protons in its atomic nucleus. Elements are divided into metals, metalloids, and non-metals. Familiar examples of elements are carbon, nitrogen, oxygen (non-metals), silicon, arsenic (metalloids), aluminium, iron, copper, gold, mercury, and lead (metals).
The lightest chemical elements, including hydrogen, helium and smaller amounts of lithium, beryllium and boron, are thought to have been produced by various cosmic processes during the Big Bang and cosmic-ray spallation. Production of heavier elements, from carbon to the very heaviest elements, proceeded by stellar nucleosynthesis, and these were made available for later solar system and planetary formation by planetary nebulae and supernovae, which blast these elements into space. The high abundance of oxygen, silicon, and iron on Earth reflects their common production in such stars. While most elements are generally stable, a small amount of natural transformation of one element to another also occurs in the decay of radioactive elements as well as other natural nuclear processes." [Chemical element. Wikipedia]
The chemical symbols example "Design elements - Periodic table of chemical elements" was created using the ConceptDraw PRO software extended with the Chemistry solution from the Science and Education area of ConceptDraw Solution Park.
Mendeleev periodic table icons
Mendeleev periodic table icons, zirconium, Zr, zinc, Zn, yttrium, Y, ytterbium, Yb, xenon, Xe, vanadium, V, uranium, U, ununtrium, Uut, ununseptium, Uus, ununpentium, Uup, ununoctium, Uuo, tungsten, W, titanium, Ti, tin, Sn, thulium, Tm, thorium, Th, thallium, Tl, terbium, Tb, tellurium, Te, technetium, Tc, tantalum, Ta, sulfur, S, strontium, Sr, sodium, Na, silver, Ag, silicon, Si, selenium, Se, seaborgium, Sg, scandium, Sc, samarium, Sm, rutherfordium, Rf, ruthenium, Ru, rubidium, Rb, roentgenium, Rg, rhodium, Rh, rhenium, Re, radon, Rn, radium, Ra, protactinium, Pa, promethium, Pm, praseodymium, Pr, potassium, K, polonium, Po, plutonium, Pu, platinum, Pt, phosphorus, P, palladium, Pd, oxygen, O, osmium, Os, nobelium, No, nitrogen, N, niobium, Nb, nickel, Ni, neptunium, Np, neon, Ne, neodymium, Nd, molybdenum, Mo, mercury, Hg, mendelenium, Md, meitnerium, Mt, manganese, Mn, magnesium, Mg, lutetium, Lu, livermorium, Lv, lithium, Li, lead, Pb, lawrencium, Lr, lanthanum, La, krypton, Kr, iron, Fe, iridium, Ir, iodine, I, indium, In, hydrogen, H, holmium, Ho, helium, He, hassium, Hs, hafnium, Hf, gold, Au, germanium, Ge, gallium, Ga, gadolinium, Gd, francium, Fr, fluorine, F, flerovium, Fl, fermium, Fm, europium, Eu, erbium, Er, einsteinium, Es, dysprosium, Dy, dubnium, Db, darmstadtium, Ds, curium, Cm, copper, Cu, copernicium, Cn, cobalt, Co, chromium, Cr, chlorine, Cl, cerium, Ce, carbon, C, californium, Cf, calcium, Ca, caesium, Cs, cadmium, Cd, bromine, Br, boron, B, bohrium, Bh, bismuth, Bi, berylium, Be, berkelium, Bk, barium, Ba, astatine, At, arsenic, As, argon, Ar, antimony, Sb, americium, Am, aluminium, Al, actinium, Ac,