diff --git a/.config/guix/manifests/desktop.scm b/.config/guix/manifests/desktop.scm
index 7c92174..0873967 100644
--- a/.config/guix/manifests/desktop.scm
+++ b/.config/guix/manifests/desktop.scm
@@ -1,10 +1,12 @@
 (specifications->manifest
  '(
+   "keepassxc"
    "thunar"
    "xmodmap"
    "copyq"
    "feh"
    "network-manager-applet"
+   "light"
    "arandr"
    "xrandr"
    "flatpak"
diff --git a/.config/guix/systems/azure.scm b/.config/guix/systems/azure.scm
new file mode 100644
index 0000000..300fe6e
--- /dev/null
+++ b/.config/guix/systems/azure.scm
@@ -0,0 +1,99 @@
+;; [[file:../../../Guix.org::*azure][azure:1]]
+(use-modules (gnu))
+(use-modules (gnu system nss))
+(use-modules (gnu packages certs))
+(use-modules (gnu packages version-control))
+(use-modules (gnu packages vim))
+(use-modules (gnu packages gnome))
+(use-modules (gnu packages xorg))
+(use-modules (gnu packages wm))
+(use-modules (gnu packages openbox))
+(use-modules (nongnu packages linux))
+(use-modules (nongnu system linux-initrd))
+
+(use-service-modules desktop networking ssh xorg)
+(use-package-modules ssh)
+(define %my-desktop-services
+  (modify-services %desktop-services
+                   (network-manager-service-type config =>
+                                                 (network-manager-configuration (inherit config)
+                                                                                (vpn-plugins (list network-manager-openvpn))))))
+
+
+(define %backlight-udev-rule
+  (udev-rule
+   "90-backlight.rules"
+   (string-append "ACTION==\"add\", SUBSYSTEM==\"backlight\", "
+                  "RUN+=\"/run/current-system/profile/bin/chgrp video /sys/class/backlight/%k/brightness\""
+                  "\n"
+                  "ACTION==\"add\", SUBSYSTEM==\"backlight\", "
+                  "RUN+=\"/run/current-system/profile/bin/chmod g+w /sys/class/backlight/%k/brightness\"")))
+
+(operating-system
+ (kernel linux)
+ (initrd microcode-initrd)
+ (firmware (list linux-firmware))
+ (locale "en_US.utf8")
+ (timezone "Europe/Moscow")
+ (keyboard-layout (keyboard-layout "us,ru" #:options '("grp:alt_shift_toggle")))
+ (users (cons* (user-account
+                (name "pavel")
+                (comment "Pavel")
+                (group "users")
+                (home-directory "/home/pavel")
+                (supplementary-groups
+                 '("wheel"  ;; sudo
+                   "netdev" ;; network devices
+                   "audio"
+                   "video"
+                   "input"
+                   "tty"
+                   ;; "docker"
+                   "lp")))
+               %base-user-accounts))
+ 
+ (packages
+  (append
+   (list nss-certs
+ 	    git
+         i3-gaps
+         openbox
+         xterm
+ 	    vim)
+   %base-packages))
+
+ (host-name "azure")
+ (services (append
+            (list (service openssh-service-type)
+                  (set-xorg-configuration
+                   (xorg-configuration
+                    (keyboard-layout keyboard-layout))))
+            (modify-services %my-desktop-services
+                             (elogind-service-type config =>
+                                                   (elogind-configuration (inherit config)
+                                                                          (handle-lid-switch-external-power 'suspend)))
+                             (udev-service-type config =>
+                                                (udev-configuration (inherit config)
+                                                                    (rules (cons %backlight-udev-rule
+                                                                                 (udev-configuration-rules config))))))))
+
+ (bootloader
+  (bootloader-configuration
+   (bootloader grub-efi-bootloader)
+   (target "/boot/efi")
+   (keyboard-layout keyboard-layout)))
+
+ (swap-devices
+  (list (uuid "4b2dedb3-b111-4e69-8c05-6daa2b072c76")))
+
+ (file-systems
+  (cons* (file-system
+          (mount-point "/")
+          (device (file-system-label "my-root"))
+          (type "ext4"))
+	     (file-system
+	      (mount-point "/boot/efi")
+	      (device "/dev/sda1")
+	      (type "vfat"))
+         %base-file-systems)))
+;; azure:1 ends here
diff --git a/.config/guix/systems/blue.scm b/.config/guix/systems/blue.scm
index 33f5f29..265cd02 100644
--- a/.config/guix/systems/blue.scm
+++ b/.config/guix/systems/blue.scm
@@ -4,6 +4,8 @@
 (use-modules (gnu packages certs))
 (use-modules (gnu packages version-control))
 (use-modules (gnu packages vim))
+(use-modules (gnu packages gnome))
+(use-modules (gnu packages xorg))
 (use-modules (gnu packages wm))
 (use-modules (gnu packages openbox))
 (use-modules (nongnu packages linux))
@@ -11,19 +13,20 @@
 
 (use-service-modules desktop networking ssh xorg)
 (use-package-modules ssh)
+(define %my-desktop-services
+  (modify-services %desktop-services
+                   (network-manager-service-type config =>
+                                                 (network-manager-configuration (inherit config)
+                                                                                (vpn-plugins (list network-manager-openvpn))))))
+
 
 (operating-system
-  ;; Use the full Linux kernel
   (kernel linux)
   (initrd microcode-initrd)
   (firmware (list linux-firmware))
   (locale "en_US.utf8")
   (timezone "Europe/Moscow")
-  
-  ;; US/RU keyboard layout
   (keyboard-layout (keyboard-layout "us,ru" #:options '("grp:alt_shift_toggle")))
-  
-  ;; User accounts
   (users (cons* (user-account
                  (name "pavel")
                  (comment "Pavel")
@@ -40,24 +43,15 @@
                     "lp")))
                 %base-user-accounts))
   
-  ;; Base packages
   (packages
    (append
     (list nss-certs
   	    git
           i3-gaps
           openbox
+          xterm
   	    vim)
     %base-packages))
-  
-  ;; Services
-  (services
-   (append
-    (list (service openssh-service-type)
-          (set-xorg-configuration
-           (xorg-configuration
-            (keyboard-layout keyboard-layout))))
-    %desktop-services))
  (host-name "blue")
 
  (bootloader
diff --git a/.config/i3/config b/.config/i3/config
index 8759cdb..e0c5dae 100644
--- a/.config/i3/config
+++ b/.config/i3/config
@@ -293,10 +293,10 @@ bindsym $mod+semicolon mode "apps"
 
 mode "apps" {
     bindsym Escape mode "default"
-    bindsym b exec firefox; mode default
+    bindsym b exec "flatpak run org.mozilla.firefox"; mode default
     bindsym v exec vk-messenger; mode default
-    bindsym s exec slack; mode default;
-    bindsym d exec discord; mode default;
+    bindsym s exec "flatpak run com.slack.Slack"; mode default;
+    bindsym d exec "flatpak run com.discordapp.Discord"; mode default;
     bindsym m exec "alacritty -e ncmpcpp"; mode default
     bindsym c exec "copyq toggle"; mode default
     bindsym k exec "keepassxc"; mode default
@@ -326,8 +326,8 @@ bindsym XF86AudioNext exec mpc next
 bindsym XF86AudioPrev exec mpc prev
 
 # Screen brightness
-bindsym XF86MonBrightnessUp exec xbacklight -inc 5
-bindsym XF86MonBrightnessDown exec xbacklight -dec 5
+bindsym XF86MonBrightnessUp exec light -A 5
+bindsym XF86MonBrightnessDown exec light -U 5
 # Media controls & brightness:1 ends here
 
 # [[file:../../Desktop.org::*Screenshots][Screenshots:1]]
diff --git a/Desktop.org b/Desktop.org
index 05345db..8566af8 100644
--- a/Desktop.org
+++ b/Desktop.org
@@ -541,10 +541,10 @@ bindsym $mod+semicolon mode "apps"
 
 mode "apps" {
     bindsym Escape mode "default"
-    bindsym b exec firefox; mode default
+    bindsym b exec "flatpak run org.mozilla.firefox"; mode default
     bindsym v exec vk-messenger; mode default
-    bindsym s exec slack; mode default;
-    bindsym d exec discord; mode default;
+    bindsym s exec "flatpak run com.slack.Slack"; mode default;
+    bindsym d exec "flatpak run com.discordapp.Discord"; mode default;
     bindsym m exec "alacritty -e ncmpcpp"; mode default
     bindsym c exec "copyq toggle"; mode default
     bindsym k exec "keepassxc"; mode default
@@ -574,8 +574,8 @@ bindsym XF86AudioNext exec mpc next
 bindsym XF86AudioPrev exec mpc prev
 
 # Screen brightness
-bindsym XF86MonBrightnessUp exec xbacklight -inc 5
-bindsym XF86MonBrightnessDown exec xbacklight -dec 5
+bindsym XF86MonBrightnessUp exec light -A 5
+bindsym XF86MonBrightnessDown exec light -U 5
 
 #+end_src
 *** Screenshots
@@ -2058,13 +2058,16 @@ flatpak install --user flathub com.slack.Slack
 Other desktop programs I use are listed below.
 
 | Guix dependency        | Description                               |
+|------------------------+-------------------------------------------|
 | xrandr                 | X11 CLI to RandR                          |
 | arandr                 | GUI to xrandr                             |
+| light                  | Control screen brightness                 |
 | network-manager-applet | Applet to manage network connections      |
 | feh                    | Image viewer. Used to set background      |
 | copyq                  | Clipboard manager                         |
 | xmodmap                | Program to modify keybindings on X server |
 | thunar                 | My preferred GUI file manager             |
+| keepassxc              | My preferred password manager             |
 
 #+NAME: packages
 #+begin_src emacs-lisp :tangle no
diff --git a/Guix.org b/Guix.org
index 91e8506..2257765 100644
--- a/Guix.org
+++ b/Guix.org
@@ -152,6 +152,7 @@ Common modules:
 (use-modules (gnu packages certs))
 (use-modules (gnu packages version-control))
 (use-modules (gnu packages vim))
+(use-modules (gnu packages gnome))
 (use-modules (gnu packages xorg))
 (use-modules (gnu packages wm))
 (use-modules (gnu packages openbox))
@@ -213,25 +214,50 @@ Base packages, necessary right after the installation.
   %base-packages))
 #+end_src
 
-Services. As for now, just extending =%desktop-services=. In future, this part will probably be made specific for each machine.
-#+begin_src scheme :tangle no :noweb-ref system-base
-(services
- (append
-  (list (service openssh-service-type)
-        (set-xorg-configuration
-         (xorg-configuration
-          (keyboard-layout keyboard-layout))))
-  %desktop-services))
+Default services for each machine. Overrides the default =%desktop-services= to add OpenVPN support
+#+begin_src scheme :tangle no :noweb-ref system-common
+(define %my-desktop-services
+  (modify-services %desktop-services
+                   (network-manager-service-type config =>
+                                                 (network-manager-configuration (inherit config)
+                                                                                (vpn-plugins (list network-manager-openvpn))))))
+
 #+end_src
+
 ** azure
 =azure= is a Lenovo Ideapad 330 laptop.
+
+=%backlight-udev-rule= should enable member of =video= group change the display backlight. See the relevant page at [[https://wiki.archlinux.org/title/Backlight][Arch Wiki]].
+
 #+begin_src scheme :noweb yes :tangle ~/.config/guix/systems/azure.scm
 <<system-common>>
 
+(define %backlight-udev-rule
+  (udev-rule
+   "90-backlight.rules"
+   (string-append "ACTION==\"add\", SUBSYSTEM==\"backlight\", "
+                  "RUN+=\"/run/current-system/profile/bin/chgrp video /sys/class/backlight/%k/brightness\""
+                  "\n"
+                  "ACTION==\"add\", SUBSYSTEM==\"backlight\", "
+                  "RUN+=\"/run/current-system/profile/bin/chmod g+w /sys/class/backlight/%k/brightness\"")))
+
 (operating-system
  <<system-base>>
 
  (host-name "azure")
+ (services (append
+            (list (service openssh-service-type)
+                  (set-xorg-configuration
+                   (xorg-configuration
+                    (keyboard-layout keyboard-layout))))
+            (modify-services %my-desktop-services
+                             (elogind-service-type config =>
+                                                   (elogind-configuration (inherit config)
+                                                                          (handle-lid-switch-external-power 'suspend)))
+                             (udev-service-type config =>
+                                                (udev-configuration (inherit config)
+                                                                    (rules (cons %backlight-udev-rule
+                                                                                 (udev-configuration-rules config))))))))
 
  (bootloader
   (bootloader-configuration
@@ -332,6 +358,21 @@ Don't forget to install =JetBrainsMono Nerd Font=.
 | Category | Guix dependency    |
 |----------+--------------------|
 | browsers | ungoogled-chromium |
+| browsers | firefox            |
+** Office
+| Category | Guix dependency |
+|----------+-----------------|
+| office   | libreoffice     |
+| office   | gimp            |
+** LaTeX
+| Category | Guix dependency |
+|----------+-----------------|
+| latex    | texlive         |
+** System
+| Category | Guix dependency         |
+|----------+-------------------------|
+| system   | openvpn                 |
+| system   | python                  |
 ** Manifests
 #+NAME: packages
 #+begin_src emacs-lisp :tangle no :var category=""
@@ -345,20 +386,26 @@ Browsers
    <<packages("browsers")>>))
 #+end_src
 
-Dev
-#+begin_src scheme :tangle .config/guix/manifests/dev.scm :noweb yes
+System
+#+begin_src scheme :tangle .config/guix/manifests/system.scm :noweb yes
 (specifications->manifest
  '(
-   <<packages("dev")>>))
+   <<packages("system")>>))
 #+end_src
 
+Office
+#+begin_src scheme :tangle .config/guix/manifests/office.scm :noweb yes
+(specifications->manifest
+ '(
+   <<packages("office")>>))
+#+end_src
 * Notes on installing software
 | Category | Guix dependency | Description                                        |
 |----------+-----------------+----------------------------------------------------|
-| dev      | patchelf        | A program to modify existsing ELF executables      |
-| dev      | glibc           | A lot of stuff, including ELF interpeter and ~ldd~ |
+| system   | patchelf        | A program to modify existsing ELF executables      |
+| system   | glibc           | A lot of stuff, including ELF interpeter and ~ldd~ |
 ** flatpak
-As for now, the easiest way to install most of proprietary software is via flatpak. See the relevant section in [[file:Desktop.org][Desktop.org]].
+As for now, the easiest way to install most of proprietary software is via flatpak. See the relevant section in [[file:Desktop.org][Desktop.org]]   .
 ** wakatime-cli
 | Note | Description           |
 |------+-----------------------|