\starttext
\startTEXpage
\starttabulate[|l|l|]
  \NC Current Symbols \NC \NR
  \NC $:=$ \NC $\colonequals$ \NC \NR
  \NC $=:$ \NC $\equalscolon$ \NC \NR
  \NC $<=$ \NC $\le$ \NC \NR
  \NC $>=$ \NC $\ge$ \NC \NR
  \NC $!=$  \NC $\neq$ \NC \NR
  \NC Proposed editions \NC \NR
  \NC $<<$ \NC $\ll$ \NC \NR
  \NC $>>$ \NC $\gg$ \NC \NR
  \NC $<<<$ \NC $\lll$ \NC \NR
  \NC $>>>$ \NC $\ggg$ \NC \NR
  \NC $==$ \NC $\equiv$ \NC \NR
  % Arrows
  \NC $->$ \NC $\rightarrow$ \NC \NR
  \NC $<-$ \NC $\leftarrow$ \NC \NR
  \NC $<->$ \NC $\leftrightarrow$ \NC \NR
  \NC $==>$ \NC $\Rightarrow$ \NC \NR
  \NC $<==$ \NC $\Leftarrow$ \NC \NR
  \NC $<=>$ \NC $\Leftrightarrow$ \NC \NR
  \NC $<===$ \NC $\Longleftarrow$ \NC \NR
  \NC $<==>$ \NC $\Longleftrightarrow$ \NC \NR
  \NC How to get these \NC \NR 
  \NC $===$ \NC $\eqeqeq$ \NC \NR
  \NC $===>$ \NC $\Longrightarrow$ \NC \NR
\stoptabulate
\stopTEXpage
\stoptext