You will need to create an indico account in order to be able to submit an abstract.
There are three possible contribution types:
Posters in format A0 portrait and as a PDF for online participants
Oral presentations in the common 15 minute presentation + 5 minute question format, totaling to 20 minutes
Long oral The NOBUGS committee may elect particular interesting contributions or those of keynote speakers to 40 minutes presentation + 5 minutes for questions. 45 minutes in total.