Here is a glossary of G-Shock features as well as significant G-Shock models and terms:

Analog-Digital: A watch with both analog hands and a LCD digital display.

Baby-G: A sister brand to G-Shock featuring women’s watches with shock resistance and at least 100-meter water resistance.

DLC: Diamond-like carbon, a special dark, scratch-resistant coating seen on some MR-G luxury models.

DW-5000C: The first G-Shock model introduced in 1983. It was available as the DW-5000C-1A with red accent and DW-5000C-1B with gold accent.

DW-5600: A current basic G-Shock model that is the closest descendant of the DW-5000C. The Tough Solar/Multi-Band 6 version is the GW-M5610. There are also other 5000-5600 series watches such as the GW-5000 and G-LIDE GLX-5600/GWX-5600.

DW-6900: A long-running G-Shock series introduced in 1995 known for its iconic case and front EL backlight button. The Tough Solar/Multi-Band 6 version is the GW-6900.

EL Backlight: Electro-luminescent backlight which illuminates the background of the entire digital display. Seen on some digital models like the DW-5600 and DW-6900.

Frogman: G-Shock’s professional diving line of watches featuring a screw-lock case back and ISO Diver’s 200M water resistance.

G-LIDE: Extreme sports line of G-Shock watches designed for surfing and snowboarding.

G-SQUAD: A fitness line of G-Shock watches featuring a Step Tracker and Bluetooth connectivity.

G-STEEL: A mid-range analog-digital G-Shock line featuring a stainless steel body and dual-layer bezel. Options include resin and stainless steel bands and resin and stainless steel outer bezels.

GPS Hybrid Wave Ceptor: Uses Multi-Band 6 radio time syncing or GPS time signals when out of range of the Multi-Band 6 transmitter stations. Seen in high-end models like the GPW-1000, MTG-G1000, and MRG-G1000.

Gravitymaster: A line of G-Shock aviation watches inspired by the look of instrument panels.

Gulfmaster: A boating and maritime G-Shock line.

GW-5000: A G-Shock model that is considered by many to be the best 5000-5600 model with a screw-back case like the original DW-5000C and Tough Solar/Multi-Band 6.

Kikuo Ibe: The creator and “Father of G-Shock,” now currently Research and Development Chief Engineer at Casio. His motto is “Never give up.”

Master of G: Professional line of G-Shock watches that includes the “-man” and “-master” series.

MR-G: The top G-Shock line of analog watches featuring titanium bodies and bands.

MT-G: Metal-Twisted G-Shock line of luxury watches made of stainless steel and resin.

Mudman: Mud-resistant line of G-Shock watches.

Mudmaster: Analog-digital mud-resistant G-Shock line.

Multi-Band 6: A feature that automatically syncs the watch time with atomic clocks through the reception of radio waves from six radio transmitters worldwide. The transmitters are located in Japan (Fukishima and Kyushu), North America, England, Germany, and China.

Neon Illuminator: Uses a UV-A (blacklight) LED to illuminate phosphorous-coated hands and index in the dark.

Premium Production Line: Part of the Yamagato Casio factory in Japan where the most experienced employees assemble high-end G-Shock watches like the MT-G and MR-G series.

Pro Trek: Casio brand of outdoor watches featuring Tough Solar power and environmental sensors.

Rangeman: G-Shock survival line of digital watches featuring solar-power and Triple Sensor. The GPR-B1000 series also includes GPS tracking and navigation.

Reverse LCD Display: An inverted digital display with a black background and light digits. Also known as a “negative LCD display.”

S Series: A smaller G-Shock line of watches that are about 30% smaller than their counterparts.

Step Tracker: A fitness feature in some G-Shock and Baby-G watches that records steps taken.

STN LCD Display: Super-twisted nematic LCD display that provides better viewing and contrast.

Super Illuminator: An extra-bright LED light.

Tough Leather: A synthetic leather band seen on some G-STEEL models.

Tough Solar: Casio’s solar watch technology that uses solar panels on the display and a rechargeable battery.

Triple G Resist: Resistance to shock, g-forces, and vibration. Seen in some Gravitymaster and MT-G watches.

Triple Sensor: Environmental sensors including a pressure sensor (altimter-barometer), compass, and thermometer. It may also include a water depth sensor in place of the pressure sensor as in the case of the Frogman GWF-D1000.

Twin Sensor: Environmental sensors including compass and thermometer.

Quad Sensor: Environmental sensors including the Triple Sensor plus a water depth meter.