1.$ MAIL
      MAIL> COMPRESS
      %MAIL-S-CREATED, DISK$FUN:[SMITH]MAIL_08C8_COMPRESS.TMP;1 created
      %MAIL-S-COPIED, DISK$FUN:[SMITH]MAIL.MAI;1 copied to DISK$FUN:[SMITH]
      MAIL_08C8_COMPRESS.TMP;1 (2 records)
      %MAIL-S-RENAMED, DISK$FUN:[SMITH]MAIL.MAI;1 renamed to DISK$FUN:[SMITH]
      MAIL.OLD;2
      %MAIL-S-RENAMED, DISK$FUN:[SMITH]MAIL_08C8_COMPRESS.TMP;1 renamed to
      DISK$FUN:[SMITH]MAIL.MAI;1

      This example shows how to compress the contents of your default
      mail file (MAIL.MAI).

    2.MAIL> COMPRESS trips.mai
      %MAIL-S-CREATED, DISK$FUN:[SMITH]MAIL_08C8_COMPRESS.TMP;1 created
      %MAIL-S-COPIED, DISK$FUN:[SMITH]TRIPS.MAI;1 copied to DISK$FUN:[SMITH]
      MAIL_08C8_COMPRESS.TMP;1 (2 records)
      %MAIL-S-RENAMED, DISK$FUN:[SMITH]TRIPS.MAI;1 renamed to DISK$FUN:[SMITH]
      TRIPS.OLD;2
      %MAIL-S-RENAMED, DISK$FUN:[SMITH]MAIL_08C8_COMPRESS.TMP;1 renamed to
      DISK$FUN:[SMITH]TRIPS.MAI;1

      This example shows how to compress the contents of a file named
      TRIPS.MAI.