home.md

+# Next Generation Data Delivery
 
 This is the home of LIGO's Next Generation Data Delivery (NGDD) project, the aim of which is to develop a low-latency data distribution and stream processing platform to meet the needs of real-time searches for gravitational waves.
 
@@ -14,9 +15,22 @@ This is the home of LIGO's Next Generation Data Delivery (NGDD) project, the aim
   - [Materialize](https://docs.google.com/presentation/d/1F0l7TKwxD4BHX4JHTXBIywApURG-OA7VRmUjlbtGi_U/edit?usp=sharing)
   - [Materialize/ClickHouse](https://docs.google.com/presentation/d/1D0Kyg694PlKnOgHIK2lJJvAHR4aWju9xGolUWwOHG7U/edit?usp=sharing)
 
+## technologies
+
+Links to technologies being considered:
+
+- [gRPC](https://grpc.io/)
+- [Arrow](https://arrow.apache.org/)
+  - [Arrow Flight](https://arrow.apache.org/blog/2019/10/13/introducing-arrow-flight/)
+- [Kafka](https://kafka.apache.org/)
+- [influxDB](https://www.influxdata.com/)
+- [gstreamer RTP/RTSP](https://gstreamer.freedesktop.org/documentation/additional/rtp.html?gi-language=c)
+- [consul](https://www.consul.io/)
 
 ## applications
 
+Links to resources about applications that will use the system in LIGO.
+
 - [low-latency application table](https://docs.google.com/spreadsheets/d/15JzZ1KEHscwXhny8L0lxZIYXkiv6LlkCgSLi_Iuruyw/edit#gid=1412826968)
 - [open public alerts application table (searches)](https://docs.google.com/spreadsheets/d/1kLO84LNSj6B_PTlB35ujh-uYxXLdFc7L4P2lxY1-KXc/edit#gid=1943285589)
 
@@ -25,8 +39,3 @@ This is the home of LIGO's Next Generation Data Delivery (NGDD) project, the aim
 - [
 The next generation of low-latency data distribution and stream processing for LIGO
 ](https://dcc.ligo.org/LIGO-G2200571)
-
-## resources
-
-- [gstreamer RTP/RTSP](https://gstreamer.freedesktop.org/documentation/additional/rtp.html?gi-language=c)
-- [consul](https://www.consul.io/)
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