When arranging accommodation, note that in British English a "single", "double", "queen", or "king" room has one individual bed. A "twin" room has two individual beds. A "triple" room has three individual beds. Dates are usually written with the day first, so 07/03/12 is 7th March, 2012. Check whether or not prices are inclusive of VAT (sales tax), and whether they are per-room, or per-person.

We have block bookings at a number of central London hotels from which it is easy to reach the venue by tube. We include details of the connections below (for maps and journey times see http://www.tfl.gov.uk/). It is advisable to book accommodation early to avoid any disappointment. There are a limited number of rooms held at each venue, and any unused rooms are released on 2nd February, 2012.

• Best Western Mornington Hotel, 3 Star. £87.50 plus VAT per night, including breakfast. Near Lancaster Gate station, take Central Line to Oxford Circus, change to Bakerloo Line to Piccadilly Circus.

• Hotel Russell, 4 Star, near Russell Square station. £155 plus VAT per night, including breakfast. Near Russell Square station, Piccadilly Line to Piccadilly Circus.

• Hesperia London Victoria, 4 Star. Superior king room, £140 plus VAT per night (1 person) or £156.80 plus VAT per night (2 people). Including breakfast. Near Victoria Station, take Circle or Distict Line to Embankment.

Bookings at the Best Western Mornington Hotel and Hotel Russell can be made via Banks Sadler.

Bookings at the Hesperia London Victoria are made directly with the hotel via e-mail or phone – e-mail rsvt.hhlondonvictoria@nh-hotels.com quoting group reference 157837322, or phone +442078348123 (outside the UK), or 02078348123 (within the UK).

If searching on sites such as expedia.co.uk or booking.com, the location "Trafalgar Square, London" will find the correct area.

In addition to these options, attendees may wish to consider budget hotel chains such as Ibis, Premier Inn, and Travelodge. These are more basic than full-service hotels, but can provide cheap accommodation at central locations. Many offer twin or triple rooms. We have no arrangement with any of these hotels, but provide links to some that are near central London tube stations with a straightforward journey to the conference venue:

• Ibis London Euston St Pancras (near Euston Station, Northern Line to Charing Cross),

• Premier Inn London Euston (near Euston Station, Northern Line to Charing Cross),

• Premier Inn London Kings Cross St Pancras (near Kings Cross Station, Piccadilly Line to Piccadilly Circus),

• Travelodge London Covent Garden (near Covent Garden Station, Piccadilly Line to Piccadilly Circus — or 1 mile walk door-to-door),

• Travelodge London Euston (near Euston Station, Northern Line to Charing Cross),

• Travelodge London Kings Cross Royal Scot (near Kings Cross Station, Piccadilly Line to Piccadilly Circus), and

• Travelodge London Marylebone (near Marylebone Station, Bakerloo Line to Piccadilly Circus).

It is also worth checking the prices for serviced apartments, particularly for longer-term stays for groups.

Registration is being handled via RegOnline at http://www.regonline.com/vee12.

Registration fees should be paid either in US dollars, by Visa, Mastercard, or American Express.

Registration for the main conference includes lunch on both Saturday and Sunday and, subject to budget, dinner on Saturday evening.

Your VEE registration also entitles you, if space permits, to drop in on the various ASPLOS workshops being run over the weekend.

Participants should be particularly aware and careful about visa requirements. The UK Border Agency web site (http://www.ukba.homeoffice.gov.uk/visas-immigration/) provides general information about visa requirements, and how to apply.

The ACM does not issue formal invitation letters for visas to attend ACM sponsored conferences. The ACM can, however, issue a visa support letter. For Visa support letters, please send all requests to the Office of SIG Services supportletters@acm.org with the following information:

• Name and mailing address as it appears on your passport
• The name of the conference you wish to attend
• Your Registration Confirmation Number
• If you are the author of any papers accepted for the conference, please provide the title
• Current mailing address (however, please note that visa support letters are issued via email)