Observe. Hack. Make.

{{Infobox recurring event

| image = OHM2013, Aug-2013.jpg

| begins = July 31, 2013

| ends = August 4, 2013

| frequency = quadrennial (every 4 years)

| first = 1989

| prev = Hacking at Random (2009)

| next = Still Hacking Anyway (2017)

| location = Geestmerambacht, Oudkarspel, Netherlands

| attendance = 3000 tickets sold

| genre = Hacker con

| website = https://ohm2013.org/

}}

File:Ohm 2013 map.jpg

Observe. Hack. Make. also known as OHM, was an outdoor hacker conference that took place in the Netherlands from July 31 to August 4, 2013.{{Cite web|url=https://ohm2013.org/|title=OHM2013|website=ohm2013.org|accessdate=Nov 29, 2022}}

This conference was part of a sequence that began with the Galactic Hacker Party in 1989, followed by Hacking at the End of the Universe in 1993, Hacking In Progress in 1997, Hackers At Large in 2001, What the Hack in 2005, and Hacking at Random in 2009. The tradition continued in 2017 with Still Hacking Anyway{{Cite web|url=https://sha2017.org/|title=SHA2017|website=sha2017.org|accessdate=Nov 29, 2022}} and May Contain Hackers in 2022.

With 3000 tickets sold,{{cite web |url=http://www.emerce.nl/agenda/ohm-2013 |title=OHM 2013 - Emerce |website=www.emerce.nl |url-status=dead |archive-url=https://web.archive.org/web/20130716052848/http://www.emerce.nl/agenda/ohm-2013 |archive-date=2013-07-16}} the camp was completely sold out weeks before it started.{{cite web |url=http://publitiek.nl/!RIWc |title=Astrid Oosenbrug: RT @ohm2013: OHM2013 is s... — Publitiek |website=publitiek.nl |url-status=dead |archive-url=https://web.archive.org/web/20140201205140/http://publitiek.nl/!RIWc |archive-date=2014-02-01}} With 700 more tickets than the previous camp{{cite web |url=http://gendo.ch/tags/har2009 |title=Har2009 | |website=gendo.ch |access-date=13 January 2022 |archive-url=https://web.archive.org/web/20160415190852/http://gendo.ch/tags/har2009 |archive-date=15 April 2016 |url-status=dead}} it was the biggest Dutch hacker camp so far.