&allocated : i1,i2,i3,i4 # accumulated bytes allocated # (total,static,string,block) &ascii : c # cset of ascii characters &clock : s # current time of day &collections : i1,i2,i3,i4 # collection count # (total,static,string,block) &cset : c # cset of all characters ¤t : C # current co-expression &date : s # current date &dateline : s # current date and time &digits : c # cset of digits 0-9 &dump : i # if non-zero, causes dump on termination &e : r # base of natural logarithms, 2.71828... &error : i # run-time error conversion control &errornumber : i # run-time error number &errortext : s # run-time error message text &errorvalue : x # run-time error offending value &errout : f # standard error output file &fail # fails &features : s1,s2,...,sn # implementation features &file : s # current source code file name &host : s # string identifying host computer &input : f # standard input file &lcase : c # cset of lower case letters a-z &letters : c # cset of all letters A-Za-z &level : i # level of current procedure call &line : i # current source code line number &main : C # main co-expression &null : n # the null value &output : f # standard output file &phi : r # The golden ratio, 1.61803... &pi : r # The value of pi, 3.14159... &pos : i # string scanning position &progname : s # file name of the executing program &random : i # random number seed ®ions : i1,i2,i3 # current region size # (static,string,block) &source : C # activator of current co-expression &storage : i1,i2,i3 # current bytes allocated # (static,string,block) &subject : s # string scanning subject &time : i # current run time in milliseconds &trace : i # procedure tracing control &ucase : c # cset of upper case letters A-Z &version : s # version of Icon