The streams discussed in the article are neither text nor binary. They're record-oriented files, which are not supported by the C language standard. Operations

The streams discussed in the article are neither text nor binary. They're record-oriented files, which are not supported by the C language standard. Operations on record-oriented files are a vendor extension that work however the vendor says they work. On the other hand, record-oriented files work just peachy with ISO standard COBOL.