ARCADIA Codes

Each article or title in ARCADIA contains certain general information about the subject of the article.  This information will be in a specific format, depending upon the type of article it is.  The following types of information may be given: More complete descriptions of each type of information are given below.

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General Class

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Power ratings (Pwr)

c/m/p, where c, m and p are numbers from 1 to 8, expressing the entity's relative power in commerce (c), military (m) and political stability (p).  Note that this is power relative to the entity's peers in its class; a major corp's power is on a different scale than a local settlement.

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DMTP code (DMTP)

A planet's classification according to the Dark Matter Tracking Program code, which may be a letter from A to Z as well as a numerical sub-type.

Jump to type: A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Y -- Z

The types are as follows:
 
 
A  Lifebearing: Terran  Type A planets have naturally-occurring and naturally-supported life at present. 
Examples: Earth, Eden, Petit-Sol, Ur 
Sub-types: 
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B  Life-capable: Natural  Due to some natural condition, DMTP/B planets either did sustain life at some point in the past, or currently sustain life but will only in isolated regions. 
Examples: Nova Siberia (B8) 
Sub-types: Vulcanism (1-7), Cold (8-13), Hot (14-19)
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C  Life-capable: Artificial  Type C worlds once naturally sustained life and still would were it not for the interference of sapient beings. 
Examples: Constantinople (C3) 
Sub-types: Warfare (1-9), Ecological disaster (10-17) 
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D  Rocky-metallic: Tiny  DMTP/D planets are often planetoids, being less than 500 KM across their longest dimension.  Being rocky-metallic, their densities must be 3000kg/m³ or more. 
Examples: Gaspra (D7) 
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E  Rocky-metallic: Small  Rocky-metallic planets, with densities of 3000 kg/m³ or more, more than 500 KM but less than 5000 KM in diameter. 
Examples: Ceres (E2), Mercury (E6), Moon (Luna, E1), Io (E4) 
Sub-types: Vulcanic history (1-5), Non-vulcanic (6-11) 
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F Rocky-metallic: Medium  Rocky-metallic planets, having densities of 3000 kg/m³ or more, with diameters more than 5000 to 15000 KM.  Most will have atmospheres, though amount and content vary.  Many are near-type B. 
Examples: Venus (F1), Mars (F29)
Subtypes: Hells (1-28), Deserts (29-37) 
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G  Rocky-Metallic: Large Rocky-metallic planets, having densities of 3000 kg/m³ or more, with diameters more than 15000 KM.  Almost all will have atmospheres of some sort.
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H  Rocky-Icy: Tiny Planets with mixed rock and ice composition, having densities from 1500 to 3000 kg/m³, as well as a maximum dimension of less than 500 KM.  As with type D planets, type H planets are usually irregular in shape.  Some comets are classified as type H planets, but most are type L. 
Examples: Phobos, Deimos
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I  Rocky-Icy: Small Planets with mixed rock and ice composition, having densities from 1500 to 3000 kg/m³, and having maximum dimensions from 500 to 2500 KM.  Type I planets rarely have atmospheres, but are often spherical.
Examples: Pluto, Ariel 
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J  Rocky-Icy: Medium Planets with mixed rock and ice composition, having densities from 1500 to 3000 kg/m³ and diameters from 2500 to 7500 KM.  Some have atmospheres; almost all are spherical.
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K  Rocky-Icy: Large Planets with mixed rock and ice composition, having densities from 1500 to 3000 kg/m³, and diameters of greater than 7500 KM.  Many will have atmospheres, and virtually all are spherical.
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L  Icy: Planetoids Icy planets having densities of less than 1500 kg/m³ (though rarely lower than 1000 kg/m³), indicating that they are composed primarily of ice, as well as maximum dimensions of less than 500 KM.  Comets account for a large part of type L objects.  Some will have atmospheres, but only of a non-permanent sort.
Examples: Halley's Comet (L1) 
Sub-types: Comets (1-11)
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M  Icy: Small Icy planets having densities of less than 1500 kg/m³ (though rarely lower than 1000 kg/m³), indicating that they are composed primarily of ice, and maxiumum dimensions of at least 500 KM but not greater than 1000 KM.  Many will have atmospheres if they are close enough to a star; most are spherical. 
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N  Icy: Medium Icy planets having densities of less than 1500 kg/m³ (though rarely lower than 1000 kg/m³), indicating that they are composed primarily of ice, and diameters from 1000 to 3000 KM.  Some will have atmospheres, at least temporarily, and most are spherical. 
Examples: Dione, Umbriel, Charon
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O  Icy: Large Icy planets having densities of less than 1500 kg/m³ (though rarely lower than 1000 kg/m³), indicating that they are composed primarily of ice, and diameters of greater than 3000 KM.  Many will have subsurface oceans due to tidal heating, and some will have atmospheres.  Almost all are spherical.
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P  Gas giants: Small Consisting primarily of hydrogen (in gaseous or liquid form), these are gas giants having densities of 1250 kg/m³ or less and diameters of 40,000 KM or less.  Such worlds are very rare in Known Space. 
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Q  Gas giants: Medium Consisting primarily of hydrogen (in gaseous or liquid form), these are gas giants having densities of 1250 kg/m³ or less and diameters of 40,000 to 80,000 KM.  Most will have moons of some sort, and many have visible rings.
Examples: Uranus, Neptune 
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R  Gas giants: Large Consisting primarily of hydrogen (in gaseous or liquid form), these are gas giants having densities of 1250 kg/m³ or less and diameters of 80,000 KM or more, but masses of 1.0 x 1028 KG or less (i.e., roughly 5 x the mass of Jupiter or less).  Many will have rings and extensive moon systems.
Examples: Saturn, Jupiter
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S  Gas Giants: Brown/Grey dwarves Type S bodies are distinguished not by their diameters but rather by their masses -- roughly 1.0 x 1028 to 8.0 x 1029 KG, or roughly 5-80 times the mass of Jupiter.  These are almost-stars, the bodies whose masses were just short of that needed to ignite their hydrogen-fusion furnaces.  Detecting type S bodies was, of course, one of the reasons the DMTP was started, so there are more sub-types of S-bodies than can be listed here.
Examples:   Hidden Ember (S823)
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T  Protoplanets: Uncoalesced These are planetoids which are typically less than a billion years old, and are thus largely composed of gas and dust.  Only those bodies which have been shown by modelling to have mutual attractions likely resulting in planet-formation within 1 billion years are classed as type T.
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U  Protoplanets: Coalesced These are protoplanets which are rather more definite than type T bodies, but which are still far from being completely stabilized in clear forms.  Typically, such bodies will have a surface and fixed center of gravity, but are still undergoing a great deal of agglomeration and primal formation.
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V  Artificial: Limited life-support These are structures which have been built rather than naturally accumulating as most stellar bodies do.  Type V bodies must further meet two requirements: they must have an axis larger than 10m (or 5m for DMTP-II), and they must be incapable of sustaining life indefinitely on their own.  Thus, such stations are usually for work rather than long-term habitation. 
Examples: 
Sub-types:  Factory/Industrial/Agro (1-10), Research (11-20), Communications/Transport (21-30), Military (31-40)
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W  Artificial: Self-sustaining Basically, these are artificial structures which are designed to provide indefinite habitation by sentient lifeforms, and thus usually include aquaculture tanks, waste processing, etc.  They also tend to be rather larger than type W settlements, though not always. 
Examples: 
Sub-types: Ring (1-10), O'Neill Tube (11-20), Tube matrix (21-30) 
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X  Artificial: Unusual Due to the wide variety of sentient intelligences in Known Space, there are many unusual types of artificial stellar bodies to be found.  These usually require extensive individual description, although there are of course other references besides DMTP classification to be had.
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Y  Unusual: Natural  Unusual objects which seem natural or have yet to be proven artificial are classed as type Y. 
Example: TND Object 
No sub-types -- handled on case-by-case basis. 
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Z  Unusual: Artificial  If proven artificial, an unusual planetary object is classed as DMTP/Z.  None are known to date. 
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Planet data

Planets noted in ARCADIA have various information about them presented in a box, as below.
 
 
Name(s)  The planet's official name, and other common names, if any 
Primary  The planet's primary, whether star or other planet.  Name only is given. 
Orbit  The planet's average orbital distance, usually given in AU, but occasionally in KM. 
Diameter  The planet's average or primary diameter, in KM. 
Satellites  The planet's natural satellites greater than 500 KM, with names if available. 
Density  The planet's density in kg/m³. 
DMTP The planet's type according to the DMTP system. 
Gravity  The planet's average surface gravity (or gravity at 1 atm level, if gas giant), in G's 
Atmosphere  The planet's atmospheric type, in any 
Population  The population of sapient beings living permanently on the planet, with specific species if appropriate 

Tech LevelsTechnology Levels

 

TL

Approximate Dates (Earth equivalent)

Description

Major Forms of Technology

Life Expectancy
0 Pre-1.5 million BCE Early primates Tools, families <40
1 1.5 million - 200,000  Homo erectus Fire, language, stone tools 40
2 200,000-40,000  Neanderthal Purpose-built stone tools, clothing 41
3 40,000-10,000 Cro-Magnon Music, clay statuary 41
4 10,000-3000 Neolithic Age Agriculture, pottery, metals, the wheel, domesticated animals 42
5 3000-1500 Early Civilization Writing, cities, bronze, states, law codes, chariots 43
6 1500-1000 Early Iron Age Iron tools, accurate calendars, pi to many digits, cavalry 45
7 1000-300 Classical Age Geometry, philosophy, modern-sized states 48
8 300 BCE - 200 CE Grand Empires Road networks, standardized measures, cement, stone arches 50
9 200-900 Post-imperial Compass, abacus, printing, mathematics with zero, gun powder, optics 52
10 900-1450 Middle Ages Iron plow, banking, paper money, gothic architecture, universities 55
11 1450-1700 Enlightenment Moveable-type printing press, steel, gunpowder weapons 57
12 1700's Age of Discovery Newtonian physics, modern medicine, modern democracy, chemistry 60
13 1800's Industrial Age Industrial machines, modern corporations, global trade, global empires, standing armies 64
14 1900-1940 Electric Age Radio, vaccines, automobiles, airplanes, refrigeration 68
15 1940-1975 Consumer Age Plastics, TV, numclear energy, near-space exploration, electronic computers 72
16 1975-2010 Information Age Personal computers, virtual reality, early infopro, globalization, digitalization  77
17 2010-2030 Biotech Era White bacteria, promorphic vaccines, hydro/aeroponics, memoplast, synthetic spider silk, STL K-D 81
18 2030-2060 Nanotech Era Nanotech, fusion reactors, holopro, neutral-DNA transplants, MIGS (matter-injection graviton sorting), direct neural interfaces, voice-controlled systems 86
19 2060-2090 FTL Era FTL K-D, COSUL's ( super lubricants), braintaping/PER, orbital towers 92
20 2090-2130 Pre-Wall Inforate, full-body transplants, BTST (bio-tipped slugthrowers), Aegisite 97
21 2130-2160 The Wall Gauss weapons 103
22 2160-2190 Post-Wall Advances Antimatter weapons 109
23 2190-2210 Recent history TAPPRO (tachyon particle projection), plasma handweapons, field harmonics 116
24 2210-present Current/contemporary 122
25 n/a Ahead of the curve; next wave 129
26 n/a Practical limit of current research 137
27 n/a Conceivable but not currently practical Black hole weaponry 144?
28 n/a Possibly practical within a few decades Force fields 155?
29 n/a Possibly never practical 166?
30 n/a Furthest limits of theory Reality-switching, Dyson spheres, Ringworlds 180?
31 n/a Pure speculation Chronon/gluon spin engineering, time travel ?
32 n/a Difficult even to conceptualize Immortality ??

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Corp codes

Ratings used for corporations, in the format a/b/c/d, where (a) is total income for 2220, in trillions of AlphaBank dollars (A$) or equivalent; (b) is employees, in billions; (c) is the corporation's date of founding in its current form; and (d) is the corp's HQ or main core location, if any.
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This page (http://www.jiawen.net/arcadiacodes.html) designed and ©1999 by Rachel Kronick.   Last updated February 6, 2000.  All names mentioned are used for satiric use only, and no offense is intended or should be inferred.