checkNameSpace          check namespace
checkUrl                check if an URL can be reached
historyStack            history stack structure and methods
inc                     In-place operations
msg                     pretty logging message
notFalsy                Judgement of falsy value
quiet                   Suppress cat, print, message and warning
remove_ANSI             Remove ANSI color code
simepleStack            A simple stack structure and methods
spsOption               Get or set SPS options
strUniquefy             Uniquefy a character vector
timeout                 Run expressions with a timeout limit
