Merge pull request apache#17714 fixed typos in README.md

README.md

@@ -44,7 +44,7 @@ Beam provides a general approach to expressing [embarrassingly parallel](https:/
 
 ### The Beam Model
 
-The model behind Beam evolved from a number of internal Google data processing projects, including [MapReduce](http://research.google.com/archive/mapreduce.html), [FlumeJava](http://research.google.com/pubs/pub35650.html), and [Millwheel](http://research.google.com/pubs/pub41378.html). This model was originally known as the “[Dataflow Model](http://www.vldb.org/pvldb/vol8/p1792-Akidau.pdf)”.
+The model behind Beam evolved from several internal Google data processing projects, including [MapReduce](http://research.google.com/archive/mapreduce.html), [FlumeJava](http://research.google.com/pubs/pub35650.html), and [Millwheel](http://research.google.com/pubs/pub41378.html). This model was originally known as the “[Dataflow Model](http://www.vldb.org/pvldb/vol8/p1792-Akidau.pdf)”.
 
 To learn more about the Beam Model (though still under the original name of Dataflow), see the World Beyond Batch: [Streaming 101](https://www.oreilly.com/ideas/the-world-beyond-batch-streaming-101) and [Streaming 102](https://www.oreilly.com/ideas/the-world-beyond-batch-streaming-102) posts on O’Reilly’s Radar site, and the [VLDB 2015 paper](http://www.vldb.org/pvldb/vol8/p1792-Akidau.pdf).
 
@@ -57,7 +57,7 @@ The key concepts in the Beam programming model are:
 
 ### SDKs
 
-Beam supports multiple language specific SDKs for writing pipelines against the Beam Model.
+Beam supports multiple language-specific SDKs for writing pipelines against the Beam Model.
 
 Currently, this repository contains SDKs for Java, Python and Go.