The BeiDou Navigation Satellite System (BDS, simplified Chinese: 北斗卫星导航系统; traditional Chinese: 北斗衛星導航系統; pinyin: Běidǒu wèixīng dǎoháng xìtǒng) is a Chinese satellite navigation system. It consists of two separate satellite constellations – a limited test system that has been operating since 2000, and a full-scale global navigation system that is currently under construction. 

The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System (simplified Chinese: 北斗卫星导航试验系统; traditional Chinese: 北斗衛星導航試驗系統; pinyin: Běidǒu wèixīng dǎoháng shìyàn xìtǒng) and also known as BeiDou-1, consists of three satellites and offers limited coverage and applications. It has been offering navigation services, mainly for customers in China and neighboring regions, since 2000. 

The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites, and is under construction as of January 2015[update]. It became operational in China in December 2011, with 10 satellites in use, and began offering services to customers in the Asia-Pacific region in December 2012. It is planned to begin serving global customers upon its completion in 2020.
When will it begin to serve globally?
What is the BDS?
What is BDS an acronym for?
What's the name in traditional Chinese?
What is the English translation of the Chinese characters?
How many constellations are there?
When did the limited constellation start working?
Is the full system working?
Why not?
Which one was first operational?
How many satellites?
Did it have full coverage?
Who were it's main clients?
What was the second one called?
Will it have a lot of satellites?
When did they start building?
How many satellites were up in 2011?
Who did those serve?
Where else?
Are there plans for global service?
upon its completion in 2020
upon its completion in 2020
a Chinese satellite navigation system.
a Chinese satellite navigation system.
BeiDou Navigation Satellite System
BeiDou Navigation Satellite System
北斗衛星導航系統
北斗衛星導航系統
The English transliteration is Běidǒu wèixīng dǎoháng xìtǒng
Běidǒu wèixīng dǎoháng xìtǒng
Two.
It consists of two separate satellite constellations
2000
It has been offering navigation services, mainly for customers in China and neighboring regions, since 2000
No.
It is planned to begin serving global customers upon its completion in 2020.
It is under construction.
and is under construction as of January 2015[update].
The BeiDou Satellite Navigation Experimental System
The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System
Three
The first BeiDou system, officially called the BeiDou Satellite Navigation Experimental System (simplified Chinese: 北斗卫星导航试验系统; traditional Chinese: 北斗衛星導航試驗系統; pinyin: Běidǒu wèixīng dǎoháng shìyàn xìtǒng) and also known as BeiDou-1, consists of three satellites and offers limited coverage and applications.
No.
consists of three satellites and offers limited coverage and applications. 
customers in China and neighboring regions
mainly for customers in China and neighboring regions
The BeiDou Navigation Satellite System (BDS), also known as COMPASS or BeiDou-2
The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2
If 35 is a lot, then yes.
The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites
January 2015
The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites, and is under construction as of January 2015[update]
10
It became operational in China in December 2011, with 10 satellites in use
China
It became operational in China in December 2011, with 10 satellites in use
Customers in the Asia-Pacific region, but not in 2011
and began offering services to customers in the Asia-Pacific region in December 2012
Yes.
It is planned to begin serving global customers upon its completion in 2020