Fast, correct, consistent, portable and convenient character
    string/text processing in every locale and any native encoding. 
    Owing to the use of the 'ICU' (International Components for Unicode) 
    library, the package provides 'R' users with platform-independent functions
    known to 'Java', 'Perl', 'Python', 'PHP' and 'Ruby' programmers. Available
    features include: pattern searching (e.g., with 'Java'-like regular
    expressions or the 'Unicode' collation algorithm), random string generation,
    case mapping, string transliteration, concatenation,
    Unicode normalization, date-time formatting and parsing and many more.

Marek Gagolewski [aut, cre] (<https://orcid.org/0000-0003-0637-6028>),
    Bartek Tartanus [ctb]
    and other contributors (stringi source code);
    IBM, Unicode, Inc. and other contributors (ICU4C source code);
    Unicode, Inc. (Unicode Character Database)

c(person("Christopher", "Gandrud", role = "ctb"),
    person("Qiang", "Li", role = "ctb"),
    person("Yixuan", "Qiu", role = "aut"),
    person("Yihui", "Xie", email = "xie@yihui.name", role = c("aut", "cre")))

Provides syntax highlighting for R source code. Currently it
    supports LaTeX and HTML output. Source code of other languages is supported
    via Andre Simon's highlight package (<http://www.andre-simon.de>).

Christopher Gandrud [ctb],
  Qiang Li [ctb],
  Yixuan Qiu [aut],
  Yihui Xie [aut, cre]

Fundamental Physical Constants and Unit Conversions from NIST

c(person(given = "Jose", family = "Gama", role = c("aut","cre"),email = "rxprtgama@gmail.com"))

Fundamental physical constants (Quantity, Value, Uncertainty, Unit) for 
    SI (International System of Units) and non-SI units, plus unit conversions
    Based on the data from NIST (National Institute of Standards and Technology, USA)

Foundation of vector-like and list-like containers in
Bioconductor

The S4Vectors package defines the Vector and List virtual classes
	and a set of generic functions that extend the semantic of ordinary
	vectors and lists in R. Package developers can easily implement
	vector-like or list-like objects as concrete subclasses of Vector or
	List. In addition, a few low-level concrete subclasses of general
	interest (e.g. DataFrame, Rle, and Hits) are implemented in the
	S4Vectors package itself (many more are implemented in the IRanges
	package and in other Bioconductor infrastructure packages).