ABCDE
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Organizationmeeting patternmeeting locationwebsite
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Association for Computing Machinery (ACM) Chicago Chapterusually Wednesdays; usually 2nd Wedusually 111 E. Pearson, Chicagohttp://chicagoacm.org and Meetup
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C/C++ Users' Groupdowntownhttp://www.meetup.com/Chicago-C-CPP-Users-Group/
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Chicago Access Users Groupusually 4th Thurs200 W. Monroe, Chicagowww.caug.com
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Chicago ACM SIGGRAPH Professional Chapterhttp://www.facebook.com/group.php?gid=114437622427&v=info
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Chicago Area Hadoop Users Group (CHUG)http://www.meetup.com/Chicago-area-Hadoop-User-Group-CHUG/
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Chicago Area Scala Enthusiasts (CASE)www.meetup.com/chicagoscala
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Chicago Big Datahttp://www.meetup.com/Chicago-Big-Data/
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Chicago Cloud Computing Meetup Groupusually 4th Weddowntownhttp://www.meetup.com/The-Chicago-Cloud-Computing-Meetup-Group/
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Chicago Clojurehttp://www.meetup.com/ChicagoClj/
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Chicago Data Computing Commonshttp://www.meetup.com/ChiDC2/
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Chicago Data Visualization Grouphttp://www.meetup.com/The-Chicago-Data-Visualization-Group/
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Chicago GNU/Linux Users Group Weekly or more frequenthttp://chicagolug.org/locations/http://chicagolug.org/
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Chicago Graphic Designhttp://www.meetup.com/graphicdesign-71/
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Chicago Heroku User Groupwww.meetup.com/Chicago-Heroku-Meetup-Group/
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Chicago IA\UXwww.meetup.com/Chicago-IA-UX
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Chicago Java Users Group (CJUG)usually 3rd Tuesdayusually downtownhttp://cjug.org and Meetup
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Chicago JavaScript Meetup Groupusually Tues/Thurs200 W. Jackson, Chicagohttp://www.meetup.com/js-chi/
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Chicago LAMP Meetup Groupwww.meetup.com/The-Chicago-LAMP-Meetup-Group
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Chicago Machine Learning Study Groupwww.meetup.com/Chicago-Machine-Learning-Study-Group/
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Chicago Mobile Meetup4th Thursdaydowntownhttp://www.meetup.com/Chicago-Mobile-Application-Development-Enthusiasts
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Chicago Node.js600 W. Chicago, Chicagowww.meetup.com/Chicago-Nodejs
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Chicago PostgreSQL Meetup Groupwww.meetup.com/Chicago-PostgreSQL-User-Group
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Chicago R User Groupoften Wednesdayusually downtownwww.meetup.com/ChicagoRUG
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ChicagoRuby1st Tues; 3rd Satdowntown; Elmhurstchicagoruby.org
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Chicago Security Meetupoften last Thurs10 S. LaSalle, Chicagowww.meetup.com/Chicago-Security-Meetup
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Chicago Software CraftsmenWednesdays555 W. Jackson, Suite 500http://www.meetup.com/ChicagoSC/
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Chicago Software Process Improvement Network (C-SPIN)usually Hoffman Estatesc-spin.net
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Chicago Web Designers / Web Developerswww.meetup.com/graphicdesign-525
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Chicago Women Developershttp://www.meetup.com/WomanDevelopers/
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Chicago's official Google Developer Grouphttp://www.meetup.com/chicago-google/
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ChiPy2nd Thurs; every other month 4th Thursdowntown; northern suburbschipy.org
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Experience Design Chicagowww.xdchi.com
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Flourish - Open Source Conferencewww.flourishconf.com
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HPC & GPU Supercomputing Group of Chicagohttp://www.meetup.com/HPC-GPU-Supercomputing-Group-of-Chicago/
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IEEE Computer Society Chicago Section??http://www.ieeechicago.org/cs/CSHome/tabid/679/Default.aspx
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Mobile Advertising and Marketinghttp://www.meetup.com/Mobile-Advertising-Marketing/
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Mobile Monday Chicagowww.momochicago.org/site
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Morningstar Tech Talkshttp://www.meetup.com/Morningstar-Tech-Talks/
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Software Development CommunityOak Brook ?www.meetup.com/SoftDev
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Uniforum Chicago2nd, 4th TuesWheatonhttp://www.uniforum.chi.il.us/
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Users of Free Operating systems ("UFO")2nd Sun, 4th Tues4229 West Irving Park Road, Chicagoufo.chicago.il.us
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Windy City Perl Mongers4th Thurs (Talk), 2nd Thurs (Project Nite)540 W Madison St. Chicagochicago.pm.org
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WindyCityRailsSept 12-13, 2013South Shore Cultural Centerhttp://windycityrails.org