Bss

From the elf(5) manpage in OpenBSD:

    .bss       This section holds uninitialized data that contributes to the
               program's memory image.  By definition, the system initializes
               the data with zeros when the program begins to run.  This sec-
               tion is of type SHT_NOBITS.  The attribute types are SHF_ALLOC
               and SHF_WRITE.