&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