The BRAchytherapy PHYsics Quality Assurance System (BRAPHYQS) working group of GEC-ESTRO was originally created under the ESQUIRE Project funded by the European Commission (Grant Agreement S12.322029 (2001CVG2-005) and SPC.2002480). The ESQUIRE Project ended in December 2003. The BRAPHYQS working group was in charge of Task 6 of the ESQUIRE project. One of the outputs was the publication of the ESTRO Booklet number 8 "A Practical Guide To Quality Control Of Brachytherapy Equipment". BRAPHYQS is supported by ESTRO and receives sponsorship from industry for its meetings.