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symbol for the element calciumcalcium
[Lat.,=lime], metallic chemical element; symbol Ca; at. no. 20; at. wt. 40.078; m.p. about 839°C;; b.p. 1,484°C;; sp. gr. 1.55 at 20°C;; valence +2. Calcium is a malleable, ductile, silver-white, relatively soft metal with face-centered, cubic crystalline
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California State Information

Phone: (916) 657-9900

Area (sq mi):: 163695.57 (land 155959.34; water 7736.23) Population per square mile: 231.70
Population 2005: 36,132,147 State rank: 0 Population change: 2000-20005 6.70%; 1990-2000 13.80% Population 2000: 33,871,648 (White 46.70%; Black or African American 6.70%; Hispanic or Latino 32.40%; Asian 10.90%; Other 22.80%). Foreign born: 26.20%. Median age: 33.30
Income 2000: per capita $22,711; median household $47,493; Population below poverty level: 14.20% Personal per capita income (2000-2003): $32,464-$33,415
Unemployment (2004): 6.20% Unemployment change (from 2000): 1.30% Median travel time to work: 27.70 minutes Working outside county of residence: 17.10%

List of California counties:

  • Alameda County
  • Alpine County
  • Amador County
  • Butte County
  • Calaveras County
  • Colusa County
  • Contra Costa County
  • Del Norte County
  • El Dorado County
  • Fresno County
  • Glenn County
  • Humboldt County
  • Imperial County
  • Inyo County
  • Kern County
  • Kings County
  • Lake County
  • Lassen County
  • Los Angeles County
  • Madera County
  • Marin County
  • Mariposa County
  • Mendocino County
  • Merced County
  • Modoc County
  • Mono County
  • Monterey County
  • Napa County
  • Nevada County
  • Orange County
  • Placer County
  • Plumas County
  • Riverside County
  • Sacramento County
  • San Benito County
  • San Bernardino County
  • San Diego County
  • San Francisco City & County
  • San Joaquin County
  • San Luis Obispo County
  • San Mateo County
  • Santa Barbara County
  • Santa Clara County
  • Santa Cruz County
  • Shasta County
  • Sierra County
  • Siskiyou County
  • Solano County
  • Sonoma County
  • Stanislaus County
  • Sutter County
  • Tehama County
  • Trinity County
  • Tulare County
  • Tuolumne County
  • Ventura County
  • Yolo County
  • Yuba County
  • California Parks



    (also, Song Ha), a river in the Democratic Republic of Viet-nam (DRV), originating in Laos. Length, approximately 500km. In its upper reaches, it cuts through spurs of the TruongSon, crosses a maritime plain, and then flows into the Gulf of BacBo (Tonkin) of the South China Sea. The water level is at itshighest during the summer. In its lower course, its waters areused for irrigation. The city of Vinh (DRV) is situated on theriver.






    (theory, architecture)






    The country code for Canada.


    (1) (Certification Authority or Certificate Authority) An organization that issues digital certificates (digital IDs) and makes its public key widely available to its intended audience. See digital certificate and cryptography.

    (2) See CA Technologies.

    (3) (Continuous Availability) See fault tolerant.

    (4) (.CA) The country code for Canada. See country code.
    References in periodicals archive ?
    Down the line, Cohn said it may be possible for Circa to partner with newspaper publishers to create their own news feed.
    Lisa McRobbie, sales manager, of Circa, said: "We are delighted that our first assisted sale is now off the ground and that the Codling family have had their dreams turn into a reality.
    | Circa will be at the Wales Millennium Centre, Cardiff on Friday October 12 and Saturday, October 13.
    Circa's Wunderkammer is created by Yaron Lifschitz and the Circa Ensemble.
    Circa Survive, supported by Middle Class Rut, are at The Cockpit on Thursday September 16.
    One bedroom apartments from circa 200,000 pounds Sterling; two bedroom from circa 250,000 pounds Sterling; three bedroom garden flat circa 420,000 pounds Sterling; three bedroom houses from circa 460,000 pounds Sterling (prices do not include transaction costs and tax).
    Some of these exciting objects include an English Victorian gold and tiger's claw brooch, circa 1860; a Georgian kingfisher feather hair ornament, circa 1820; and a green iridescent South American beetle brooch mounted in gold, circa 1880.
    He engages in plenty of courteous dialogue with other modern scholars, but his real interlocutors are the five generations of humanists from circa 1290 to circa 1430.
    California-based broadband communication systems provider Polycom Inc has signed an agreement to acquire Circa Communications Ltd, a privately-held Canadian developer of voice over Internet protocol (VoIP) telephony products.
    COPIAGUE, N.Y.--With a new name, new personnel, and clearance from the Food and Drug Administration, Circa Pharmaceuticals Inc.
    Established in 2000, Circa is the international buyer of pre-owned jewelry, gemstones and watches with 13 offices worldwide including New York, Chicago, Beverly Hills, San Francisco, Washington DC, Palm Beach, Barcelona and Hong Kong.
    Front row: Bjorn Borg (circa 1981), John McEnroe (circa 1981), Fernando Gonzalez, Caroline Wozniacki, John McEnroe (circa 2010) Bjorn Borg (2010 again), Novak Djokovic, Mansour Bahrami, Martina Hingis.