Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The First Observations with the GRT at Parkes   In this contribution Marcus Price gives a first hand account of some of the
very first scientific observations undertaken with the "Giant Radio Telescope"
at Parkes. It was clearly a very exciting time of discovery, enabled by superb
engineering.

19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin