- Embedded programming
  (added 11/06/18, incomplete, priority veryhigh)

  - setup attiny25 as i2s tdm
    (added 12/24/20, incomplete, priority veryhigh)

  - Xinu new arch
    (added 03/13/21, incomplete, priority high)

  - basic interpreter
    (added 01/11/20, incomplete, priority low)

- Learning
  (added 08/29/21, incomplete, priority veryhigh)

  - mqtt from scratch
    (added 08/29/21, incomplete, priority veryhigh)

  - feedback systems: an introduction
    (added 11/02/21, incomplete, priority veryhigh)

- C Programming
  (added 11/06/18, incomplete, priority high)

  - tuntap.txt and tcp/ip stack
    (added 04/05/19, incomplete, priority high)

- Bash Scripting
  (added 02/22/19, incomplete, priority high)

  - Ping time average in GNUPlot
    (added 02/26/19, incomplete, priority medium)

  - Custom MOTD
    (added 02/26/19, incomplete, priority medium)

  - one shot webserver with openwrt
    (added 12/24/20, incomplete, priority low)

- Documentation
  (added 11/06/18, incomplete, priority medium)

  - article about chinese-english dict.
    (added 03/15/19, incomplete, priority high)

  - article about strongswan netrw
    (added 11/06/18, incomplete, priority medium)

  - travel journal
    (added 11/07/18, incomplete, priority low)

- Chinese
  (added 02/26/19, incomplete, priority medium)

- Operating Systems
  (added 03/29/19, incomplete, priority medium)