Some boxers list individual types of boxes in their PFX counts (e.g.: P12 F76 X45 E4 HH21 V4 would mean 12 plants, 76 finds, 45 exchanges, four events or event stamps, 21 hitchhikers, and four virtuals). Some include virtuals, hitchhikers, and other non-traditional boxes in a single find count, while some exclude them. Many letterboxers do not bother to keep count at all.