The best replacement for binary is ascii.

The best alternatives to binary are rated as following:
★★★★★  ascii
★★★  decimal
★★  ternary
★★  source
★★  ternary form
★★  text
★  polyatomic
★  source code
★  ascii stl
★  ascii ftp
★  linear search
★  unary operator
★  hexadecimal
★  analog
★  dichotomous
★  bcd
  dichotomy
  unary
  varbinary
  hex
  flash geothermal
  xml serialization
  forex
  non binary
  unilevel
  ascii transfer
  mlm
  rounded binary
  source distributions

Your alternative for binary is not listed? Suggest!
Speaking about binary, one probably shouldn't forget about decimal.

Other search terms related to binary and their ratings are:
★★★★★ decimal
base 10
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Google Trends

Scale is based on the average worldwide traffic of binary in all years. Click on graph for more.
binary
ascii
decimal