Table:
| $ million | 2019 | % | 2018 | % |
| --- | --- | --- | --- | --- |
| Networks & Security | 232.3 | 72.6 | 205.3 | 72.0 |
| Lifecycle Service Assurance | 88.6 | 79.7 | 87.9 | 77.9 |
| Connected Devices | 47.7 | 65.8 | 51.3 | 64.9 |
|  | 368.6 | 73.2 | 344.5 | 72.2 |
Paragraphs:
Gross margin
The Group achieved further gross margin expansion in 2019 with an increase of 1.0 percentage points, to 73.2 per cent from 72.2 per cent in 2018. This followed an increase of 0.7 percentage points last year. Once again, all the operating segments achieved an improvement in gross margin, benefiting from new product launches and a higher proportion of software sales.
Question:
Which operating segments in the table achieved an improvement in gross margin?
Answer: Networks & Security, Lifecycle Service Assurance, Connected Devices