Picocon
Picocon is the name given to a series of British science fiction conventions run by the Imperial College Science Fiction and Fantasy Society, usually taking place on a Saturday in February in Imperial College's Blackett Building, which began in 1984.
| Year | Name | Location | Guests of Honour |
| 1984 | Picocon | Imperial College | David Langford |
| 1985 | Picocon Pi | Imperial College | Dave Langford, Gerry Webb |
| 1986 | Picocon 4 | Imperial College | Dave Langford, Brian Stableford |
| 1987 | Picocon 5 | Imperial College | John Brunner, David Hardy |
| 1988 | Picocon 6 | Imperial College | Terry Pratchett, Michael Scott Rohan, Dave Langford |
| 1989 | Picocon 7 | Imperial College | Dave Langford, Terry Pratchett, Gerry Webb, Dave Lally |
| 1990 | Picocon 8 | Imperial College | Bob Shaw |
| 1991 | Picocon 9 | Imperial College | |
| 1992 | Picocon 10 | Imperial College | Dave Langford, Brian Stableford |
| 1993 | Picocon 11 | Imperial College | Colin Greenland |
| 1995 | Picocon 12 | Imperial College | Iain M. Banks |
| 1996 | Picocon 13 | Imperial College | Robert Holdstock, Stephen Baxter, Christopher Priest |
| 1997 | Picocon 14 | Imperial College | Simon Ings, Nicholas Royle |
| 1998 | Picocon 15 | Imperial College | |
| 1999 | Picocon 16 | Imperial College | Stephen Lawhead, Jane Johnson, M John Harrison |
| 2000 | Picocon 17 | Imperial College | Juliet McKenna, Brian Stableford, Garry Kilworth, Ian Watson |
| 2001 | Picocon 18 | Imperial College | Christopher Priest, Geoff Ryman, Juliet E. McKenna, Jane Killick |
| 2002 | Picocon 19 | Imperial College | Anne Gay, China Miéville, Stan Nicholls, Geoff Ryman |
| 2003 | Picocon 20 | Imperial College | Jack Cohen, Gwyneth Jones |
| 2004 | Picocon 21 | Imperial College | Peter F. Hamilton, Paul McAuley, Adam Roberts |
| 2005 | Picocon 22 | Imperial College | Gwyneth Jones, Jon Courtenay Grimwood, Brian Stableford |
| 2006 | Picocon 23 | Imperial College | Ian Watson, Natasha Mostert, Mark Roberts |
| 2007 | Picocon 24 | Imperial College | Charlie Stross, Ken MacLeod, Farah Mendlesohn |
| 2008 | Picocon 25 | Imperial College | Paul Cornell, Cory Doctorow, Liz Williams |
| 2009 | Picocon 26 | Imperial College | Pat Cadigan, Robert Rankin, Michael Marshall Smith |
| 2010 | Picocon 27 | Imperial College | Alastair Reynolds, Amanda Hemingway, Jaine Fenn |
| 2011 | Picocon 28 | Imperial College | Juliet McKenna, Kari Sperring, Paul McAuley |
| 2012 | Picocon 29 | Imperial College | Adrian Czajkowski, Justina Robson, Tricia Sullivan |
| 2013 | Picocon 30 | Imperial College | Peter F. Hamilton, Kate Griffin, Steph Swainston, Richard K. Morgan |
| 2014 | Picocon 31 | Imperial College | Sarah Pinborough, Charles Stross, David Southwood |
| 2015 | Picocon 32 | Imperial College | Cory Doctorow, Frances Hardinge, Ian McDonald, Kari Sperring, Stuart Ashen |
| 2016 | Picocon 33 | Imperial College | Paul Cornell, Michelle Paver, Carrie Hope Fletcher |
| 2017 | Picocon 34 | Imperial College | Jaine Fenn, Paul McAuley, Al Robertson, Justina Robson, Stuart Ashen |
| 2018 | Picocon 35 | Imperial College | Paul Stewart, Chris Riddell, Ben Aaronovitch, Emma Newman |
| 2019 | Picocon 36 | Imperial College | Alexis Kennedy, Lottie Bevan, Simon Morden, Andrew Bannister, Gavin Smith |