Difference between Usenet hardware groups

Messages with the subject Difference between Usenet hardware groups appeared in the following groups:

alt.comp.hardware
( Messages)
alt.comp.hardware.homebuilt
( Messages)
alt.comp.hardware.pc-homebuilt
( Messages)
uk.comp.homebuilt
( Messages)
alt.comp.hardware
( Messages)
alt.comp.hardware.homebuilt
( Messages)
alt.comp.hardware.pc-homebuilt
( Messages)
uk.comp.homebuilt
( Messages)