Index - B
| bamPm | Hat.Locale |
| bctDay | Hat.Time |
| bctHour | Hat.Time |
| bctIsDST | Hat.Time |
| bctMin | Hat.Time |
| bctMonth | Hat.Time |
| bctPicosec | Hat.Time |
| bctSec | Hat.Time |
| bctTZ | Hat.Time |
| bctTZName | Hat.Time |
| bctWDay | Hat.Time |
| bctYDay | Hat.Time |
| bctYear | Hat.Time |
| bdateFmt | Hat.Locale |
| bdateTimeFmt | Hat.Locale |
| bexecutable | Hat.Directory |
| BlockBuffering | Hat.IO, Hat.System.IO |
| bmonths | Hat.Locale |
| Bool | Hat.PreludeBuiltinTypes, Hat.PreludeBasic, Hat.Prelude |
| Bounded | Hat.PreludeBasic, Hat.Prelude |
| breadable | Hat.Directory |
| bsearchable | Hat.Directory |
| btdDay | Hat.Time |
| btdHour | Hat.Time |
| btdMin | Hat.Time |
| btdMonth | Hat.Time |
| btdPicosec | Hat.Time |
| btdSec | Hat.Time |
| btdYear | Hat.Time |
| btime12Fmt | Hat.Locale |
| btimeFmt | Hat.Locale |
| BufferMode | Hat.IO, Hat.System.IO |
| bwDays | Hat.Locale |
| bwritable | Hat.Directory |