save.or.move saves one or more objects to a file if the file does not exist.  Otherwise it attaches the file to the search path and moves the objects to this file.

'scor.bnd' computes the bounds on scores that produce a
particular academic grade.
ARGUMENTS:
'cf' = (slope, intercept) = the slope and intercept of the linear
transformation that mapped scores into grades.  The purpose of this
function is to invert this transformation and calculate the bound
on scores that mapped to given grades.
'grades' is the range of grades that will be displayed in the output.
'rangE' is the range of scores.  Its main role is to set the upper bound
of scores.
'digitS' sets the digits to be displayed in the output.
If 'vector.out == TRUE', the output is just the vector of lower
bounds for each grade (lower cutoff point).  If 'vector.out == FALSE' (default),
the output is a list.  Component 1 is a matrix showing the grades,
and the lower and upper bounds of the scores for each grade.  Component 2
shows the coefficients of the transformation from grades to scores.

'set.packages' loads non-default packages into R when R is started.
It is called by the '.First' function.  This gives an easy way to specify and
change the set of packages that are loaded automatically at startup.

setRepos sets the default repository from which to download R packages.  It is currently set to repositories that are convenient from Seattle, WA.

setwd is designed to mask the corresponding function in the base package.  setwd is identical to setwd.jm if the function is called on one of JM's computers (X220 or UHouse computer), and it is identical to the setwd function in the base package if it is called on any other computer.  The reason for having setwd operate in this way is that it makes it easier to write R code that is intelligible to students while operating in JM's preferred way when used on his computers.  As far as students are concerned when they see JM's R-code, the setwd function is simply the usual function in the base package.