Support for iterators, which allow a programmer to traverse
        through all the elements of a vector, list, or other collection
        of data.

Hong Ooi [cre],
  Revolution Analytics [aut, cph],
  Steve Weston [aut]

Pretty, Human Readable Formatting of Quantities

Pretty, human readable formatting of quantities.
    Time intervals: '1337000' -> '15d 11h 23m 20s'.
    Vague time intervals: '2674000' -> 'about a month ago'.
    Bytes: '1337' -> '1.34 kB'.

R Package Installation from Remote Repositories, Including
'GitHub'

c(
    person("Jim", "Hester", , "jim.hester@rstudio.com", role = c("aut", "cre")),
    person("Gábor", "Csárdi", , "csardi.gabor@gmail.com", role = c("aut")),
    person("Hadley", "Wickham", role = c("aut")),
    person("Winston", "Chang", role = "aut"),
    person("RStudio", role = "cph"),
    person("Martin", "Morgan", role = "aut"),
    person("Dan", "Tenenbaum", role = "aut"),
    person("Mango Solutions", role = "cph")
    )

Download and install R packages stored in 'GitHub', 'GitLab', 
    'Bitbucket', 'Bioconductor', or plain 'subversion' or 'git' repositories. 
    This package provides the 'install_*' functions in 'devtools'. Indeed most 
    of the code was copied over from 'devtools'.

brew, callr, codetools, curl, covr, git2r (>= 0.23.0), knitr,
mockery, pkgbuild (>= 1.0.1), pingr, rmarkdown, rprojroot,
testthat, withr

Subversion for install_svn, git for install_git

Jim Hester [aut, cre],
  Gábor Csárdi [aut],
  Hadley Wickham [aut],
  Winston Chang [aut],
  RStudio [cph],
  Martin Morgan [aut],
  Dan Tenenbaum [aut],
  Mango Solutions [cph]

Tools for package development, administration and documentation.

codetools, methods, xml2, curl, commonmark

Dirk Eddelbuettel <edd@debian.org> with contributions 
 by Antoine Lucas, Jarek Tuszynski, Henrik Bengtsson, Simon Urbanek,
 Mario Frasca, Bryan Lewis, Murray Stokely, Hannes Muehleisen,
 Duncan Murdoch, Jim Hester, Wush Wu, Qiang Kou, Thierry Onkelinx, 
 Michel Lang, Viliam Simko, Kurt Hornik, Radford Neal, Kendon Bell,
 Matthew de Queljoe, Ion Suruceanu, and Bill Denney.