Are DOS utilities open source.

• linux

  983 170,949 10.0 C

  Linux kernel source tree

There are implementations of that specification, such as Linux's, and those are Free Software (and Open Source).

• util-linux

  35 2,485 9.9 C
  

Also a data format. Reasonably easy to find a spec (the wikipedia article should be sufficient to implement it). Also reasonably easy to find Free Software implementations, such as fdisk.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• kernel

  5 723 8.6 C

  FreeDOS kernel - implements the core MS-DOS/PC-DOS (R) compatible operating system. It is derived from Pat Villani's DOS-C kernel and released under the GPL v2 or later. Please see http://www.freedos.org/ for more details about the FreeDOS (TM) Project. (by FDOS)

  

"DOS" is a little bit of a general term. Microsoft's product, MS-DOS, is not Free Software. But there are other implementations, including FreeDOS, which is compatible with MS-DOS.

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