+f_lambda read_char read-char
+f_lambda write_char write-char
+f_lambda exit
+f_lambda current_jiffy current-jiffy
+f_lambda current_second current-second
+f_lambda jiffies_per_second jiffies-per-second
+f_lambda finitep finite?
+f_lambda infinitep infinite?
+f_lambda inexactp inexact?
+f_lambda sqrt