R-tip: List installed R packages

> rownames(installed.packages())
 [1] "bitops"     "manipulate" "RCurl"      "rgl"        "rstudio"   
 [6] "scrapeR"    "XML"        "base"       "boot"       "class"     
[11] "cluster"    "codetools"  "compiler"   "datasets"   "foreign"   
[16] "graphics"   "grDevices"  "grid"       "KernSmooth" "lattice"   
[21] "MASS"       "Matrix"     "methods"    "mgcv"       "nlme"      
[26] "nnet"       "parallel"   "rpart"      "spatial"    "splines"   
[31] "stats"      "stats4"     "survival"   "tcltk"      "tools"     
[36] "utils"     
>