diff --git a/test/test-nlp2.js b/test/test-nlp2.js
new file mode 100644
index 0000000..c8956ed
--- /dev/null
+++ b/test/test-nlp2.js
@@ -0,0 +1,108 @@
+/* Dictionaries and keyword classification (efrt) */
+var symbols = "the them there thesis this";
+var packedDict = nlp.pack(symbols);
+var lexer = nlp.lexer(packedDict);
+print (lexer);
+print ('thesis?',lexer.true('thesis'));
+var dict = nlp.unpack(packedDict);
+print ('thesis?',dict['thesis'])
+
+var science = [
+"astronomy",
+"astrophysics",
+"atom",
+"beaker",
+"biochemistry",
+"biology",
+"botany",
+"Bunsen burner",
+"burette",
+"cell",
+"chemical",
+"chemistry",
+"climate",
+"climatologist",
+"control",
+"cuvette",
+"data",
+"datum",
+"electricity",
+"electrochemist",
+"element",
+"energy",
+"entomology",
+"evolution",
+"experiment",
+"fact",
+"flask",
+"fossil",
+"funnel",
+"genetics",
+"geology",
+"geophysics",
+"glassware",
+"graduated cylinder",
+"gravity",
+"herpetology",
+"hypothesis",
+"ichthyology",
+"immunology",
+"lab",
+"laboratory",
+"laws",
+"lepidoptery",
+"magnetism",
+"mass",
+"matter",
+"measure",
+"meteorologist",
+"meteorology",
+"microbiologist",
+"microbiology",
+"microscope",
+"mineral",
+"mineralogy",
+"molecule",
+"motion",
+"observatory",
+"observe",
+"organism",
+"ornithology",
+"paleontology",
+"particle",
+"Petri dish",
+"phase",
+"physical science",
+"physics",
+"pipette",
+"quantum mechanics",
+"radiology",
+"research",
+"retort",
+"scale",
+"science",
+"scientist",
+"seismology",
+"telescope",
+"temperature",
+"test tube",
+"theory",
+"thermometer",
+"tissue",
+"variable",
+"virologist",
+"volcanology",
+"volume",
+"volumetric flask",
+"watch glass",
+"weather",
+"weigh",
+"zoology",
+]
+var packedScience = nlp.pack(science);
+print('packedScience',packedScience.length,science.join(',').length);
+var lexer = nlp.lexer(packedScience);
+print ('lexer',lexer);
+print ('astrophysics?',lexer.true('astrophysics'));
+var dict = nlp.unpack(packedScience);
+print ('astrophysics?',dict['astrophysics'])