Next Meetup

Access Control in Physical Security
Access Control Systems Access control should comprise something you have, something you know, and something you are. Barcode, barium ferrite, magnetic strip, Weigland, proximity, and Hollerith are types of card or badge readers. Barriers restrict or impede access, are continuous, and deter threats. Locks are mechanical or electrical. Containers are classified by the Underwriters Association and categorized as burglary, record, and media. Area classification is controlled, limited, and exclusion. Roger Roehr will present detail of each providing insight to what goes on behind the scenes with access control.

Sheraton Tysons Hotel

8661 Leesburg Pike · Tysons, VA

Upcoming Meetups

Past Meetups (27)

What we're about

Northern Virginia Linux Users Group (NovaLUG) is the oldest in the Northern VA area - probably in the whole of US. Established 1993, the group is still going strong talking about Linux and anything Open Source. The group meets once a month to socialize and "geek out" on different topics, and in between mailinglists are busy connecting people to solutions, answers to questions and just people interested in Linux to other people with similar interests. For more information, consult

If there is a topic you would like to learn more about or would like to present to the group, please use the following form:

Feel free to join the NoVaLUG email list by following this link: (

Members (743)

Photos (9)

Find us also at