理学 国际空间数据处理大会 释 International Symposium on Spatial Data Handling; SDH 国际空间数据处理大会 国际地理联合会地理信息科学委员会发起的国际会议系列，是地理信息科学领域最早和最有代表性的国际会议之一。
网络与数据通信 协议体系与组成结构 释文 synchronous digital hierarchy, SDH 同步数字体系
- base of a number system
- base of a power
- base of a roulette
- base of a topological space
- base of a topology
- base of a trapezoid
- base of a triangle
- base of a uniformity
- base of a vector bundle
- base of a vector space
- base of natural logarithms
- base oil dewaxing process
- base on context information fusion
- Base Orcadas Station
- base pair
- base pair (bp)
- base pairing
- base peak
- base pension
- base period
- base point
- basepoint
- base-point-free set
- base-point-free theorem
- basepoint free theorem