anchor.diff:      let Zebi  = prefix "zebi"   "Zi"   1024   7
       let Yobi  = prefix "yobi"   "Yi"   1024   8
   
  +
  +    (*
  +        Units.
  +     *)
  +
       /// The basic unit of information in computing and digital communications.
       /// A bit can have only one of two values, most commonly represented as either a 0 or 1.
       let Bit  = U("bit", "bit")
  
positive.code:     /// 1 TB/s = 1000 GB/s.
      let TerabytePerSecond = Terabyte / Second
  
      /// 1 KiB/s = 1024 byte/s.
      let KibibytePerSecond = Kibibyte / Second
      /// 1 MiB/s = 1024 KiB/s.
      let MebibytePerSecond = Mebibyte / Second
      /// 1 GiB/s = 1024 MiB/s.
      let GibibytePerSecond = Gibibyte / Second
      /// 1 TiB/s = 1024 GiB/s.
      let TebibytePerSecond = Tebibyte / Second
  
negative.code:     open SI
      
      (*
          Base-2 multiples.
       *) 
  
      let Kibi  = prefix "kibi"   "Ki"   1024   1
      let Mebi  = prefix "mebi"   "Mi"   1024   2
      let Gibi  = prefix "gibi"   "Gi"   1024   3
  