The ultimate reference for engineers, electricians & HVAC professionals.

General
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Volume, Surface, Density, Pressure & Temperature equations & tables
Flow Units, Length, Volume, Velocity converter tables
Periodic table
Acceleration, gravity, weight & mass equations & tables
Pumps & Horsepower
Moments of Inertia for different objects
Logarithms, Exponents, Radians & Mole
Trigonometric functions & Real Numbers Algebra

Mechanics
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American Standard Beams
American Wide Flange Beams
Area Moment of Inertia
Belts - Length, Speed, Power Transmissions & Efficiency
British Universal Columns & Beams
Center of Gravity
Center of Buoyancy
Density, Specific Weight & Specific Gravity
Elastic Properties & Young Modulus
Energy
Engineering Materials
Equilibrium
Force Ratio
Gear Trains
Gears
Steel Beams
Levers
Conservation of Momentum
Mass & Weight
Modulus of Rigidity
Moment of Section Conversions
Normal Flange I Beams
Poissons Ratio Metals
Power
Pulley Diameters & Speeds
Reliability of Machine Components
Rotating Shafts & Moments
Screw Jacks
Section Modulus Conversions
Stiffness
Stress, Strain & Young's Modulus
Stresses in Thin-Walled Tubes or Cylinders
Tension Increase in Ropes due to Angle
Torque - Work done & Power transmitted
Torsion of Shafts

Elec. Eng.
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Amps & Wire Gauge
Asynchronous Motors
AWG - American Wire Gauge & Circular Mils
AWG to square mm Wire Gauge Conversion
Capacitors
Circuit Wiring - Single & Three Phase Electrical Motors
Circular Mil Area
Conductors
Converting from NEMA to IEC Enclosure Classifications
Copper Wire
Electrical Formulas
Electrical Motor
- Full Load Current
- Efficiency
- Frame Dimensions
- Locked Rotor
- Efficiency Ratings
- Hp & Amps
- HP, Torque & RPM
- Insulation Classes
- Starting Devices
- Heat Loss
Electrical Units
Electrode Potential & Galvanic Corrosion
Frequency & Speed of Electrical Motors
IEC - NEMA Standard Torques
IEC Duty Cycles
Inductance
Ingress Protection Ratings
Kirchhoff's Laws
KVA
Motor Wiring Data
NEMA A, B, C & D Design
NEMA Electrical Enclosure Types
NEMA Enclosure Standards of Electrical Motors
NEMA Insulation Classes
Nema Starters
Parallel Circuits
Potential Divider
Power & Horsepower in Electrical Motors
Power Factor for a Three-Phase Electrical Motor
Rechargeable Batteries
Resistance & Resistivity
Resistivity, Conductivity & Temperature Coefficients
Series Circuits
Service Factor
Single Phase Power Equations
Slip in Electrical Induction Motors
Speed of Electrical Motors with operating Loads
Synchronous & Full Load Speed
Synchronous Speed of Electrical Motors
Three Phase Power Equations
Three-Phase Electrical Motors
Torques in Electrical Induction Motors
Transformers
Variable-Frequency Drives
Voltage Drop
Voltage Imbalance & Derating Factor
Wire Gauges

HVAC
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* Air Conditioning
Air Conditioners
Ammonia Properties
Cooling Loads
Chilled-Water System
Cooling & Heating Equations
Freon Properties
Fruits & Vegetables Optimal Storage Conditions
Heat Gain
Lights
Air Humidity
Rectangular & Circular HVAC Ducts
Refrigerant R22
Refrigerants
Sensible Heat Ratio
Thermodynamic Properties of Refrigerant R22
Water Evaporator & Condenser Equations

* Heating
Air Heating Systems
Building Elements
Expansion Tanks
Chimneys & Fireplace Sizing
Classifications of Coal, Gas Oil, Boilers & Hot Water Heating Systems
Dowtherm A
Fittings
Flow Rates
Flow Temperatures
Food & Foodstuff
Greenhouse Temperatures
Heat Carrying Capacity of Copper Tube
Heat Emission, Loss & Sources
Hot Water Heating Systems
Overall Heat Transfer Coefficients
Safety Valves
Sizing Swimming Pool Heaters
Snow Melting Systems
Static Pressures
Thermal Expansion
Units of Heat - BTU

* and several more items for ventilation, sound and noise.