Compounds of 系

• 理系
  (n) science
  (P)
• お兄系
  (n) men's fashion style characterized by brown hair and deep-tanned skin, expensive brand-name clothes and accessories
• お姉系
  (n) (abbr) fashion style characterized by brown hair and deep-tanned skin, expensive brand-name clothes and accessories
• エー系
  (n,adj-no) (abbr) (sl) Akihabara style
  nerdy
• ビー系
  (n,adj-no) (sl) hip-hop culture
  Black culture (esp. breakdancing culture)
• 衛星系
  (n) (comp) satellite link
• 家系図
  (n) family tree
• 外資系
  (n,adj-no) foreign capital group
  foreign company
• 革新系
  (n) liberal
• 慣性系
  (n) inertial system
• 共産系
  (n) communist controlled
• 銀河系
  (n,adj-no) galaxy
  galactic system
• 系図学
  (n) genealogy (the study)
• 系統樹
  (n) genealogical tree
• 系統的
  (adj-na,n) systematic
• 系列化
  (n,vs) putting in order
  systemize
  systemise
• 結晶系
  (n) system of crystallization
  system of crystallisation
• 公理系
  (n) axiomatic system
• 恒星系
  (n) star system
• 左派系
  (n) left faction
• 座標系
  (n) coordinate system
• 時系列
  (n) chronological order (time sequential)
• 質点系
  (n) system of particles
• 秋葉系
  (n,adj-no) (sl) Akihabara style
  nerdy
• 循環系
  (n) circulatory system (blood, lymph, etc.)
• 処理系
  (n) (comp) implementation
  processor
• 消化系
  (n) digestive system
• 冗長系
  (n) redundant system (string, line)
• 神経系
  (n) nervous system
• 数体系
  (n) (comp) number system