(require 'package)
(package-initialize)
(add-to-list 'package-archives '("nongnu" . "https://elpa.nongnu.org/nongnu/") t)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t)
(add-to-list 'package-archives '("gnu-devel" . "https://elpa.gnu.org/devel/") t)
(package-refresh-contents)

(package-install 'org)
(package-install 'org-contrib)
(package-install 'org-transclusion)
(package-install 'htmlize)
(package-install 'gnuplot)
(package-install 'gnuplot-mode)